Document:

<PAGE>

                                                                   EXHIBIT 10.1D

                            HIGH CAPITAL FUNDING, LLC
                       333 Sandy Springs Circle, Suite 230
                           Atlanta, Georgia 30328-3834
                      Tel (404) 257-9150 Fax (404) 257-9125

February 7, 2007

Converted Organics Inc
7A Commercial Wharf West
Boston, MA 02110

Attention: Edward J. Gildea
           President and CEO

Re: Loan Extension and Modification Letter

Dear Ed:

     1. You have advised us that Oppenheimer Funds ("Oppenheimer), as a
condition to its purchase of COI's $17,500,000 New Jersey Economic Development
Authority Solid Waste Facilities Revenue Bonds Series A (the "Bonds"), has
requested that High Capital Funding, LLC ("HCF") enter into an agreement with
Converted Organics Inc. ("COI") to (i) extend the Maturity Date of the notes
listed on Schedule A attached (the "HCF Notes") in the aggregate principal
amount of $650,000 (which includes $500,000 of Bridge Notes as defined below),
and (ii) under certain conditions to purchase up to an aggregate of $1,015,000
of the principal amount and accrued interest of the notes listed on Schedule B
attached hereto (the "Bridge Notes").

     2. As soon as reasonably possible following the closing of the Bond
purchase, COI, HCF, and the holders of Bridge Notes ("Bridge Note Holders")
shall begin negotiations on the terms upon which the HCF Notes and the Bridge
Notes will be extended past April 19, 2007.

     3. Based upon and subject to the terms and conditions set forth in this
Loan Extension and Modification Letter (the "Extension Letter"), HCF agrees as
follows:

         (i) No principal and/or interest of the HCF Notes or the Bridge Notes
purchased by HCF pursuant to Item 3 (ii) below may be paid until the earlier of
(a) as permitted under Items 7, 8 and 9 of the February 1, 2007 OppenheimerFunds
Proposed Terms attached hereto as Exhibit 1 and as set forth in the final Bond
documents, (b) the date upon which COI has raised additional debt subordinated
to the Bonds, or equity proceeds (in addition to the IPO proceeds), which
exceeds any amount of principal and/or interest to be repaid to HCF and/or the
Bridge Notes Holders, (c) the date agreed upon pursuant to a Loan Extension and
Modification Agreement to be negotiated among COI, HCF, and the Bridge Notes
Holders (the "Approved Agreement"), (d) the date upon which HCF provides to COI
a standby letter of credit for up to

<PAGE>

$1,665,000, issued by a bank with assets of at least one billion dollars, which
may be drawn by COI during the 30 day period commencing on the first anniversary
of the IPO and Bond closing in an amount that exceeds any amount of principal
and interest to be repaid to HCF and/or the Bridge Note Holders, or (e) any
other date approved in writing by Oppenheimer; and

         (ii) In the event that there is no Approved Agreement in place by April
19, 2007, or that all of the Bridge Note Holders have not agreed to execute an
Approved Agreement by April 19, 2007, HCF shall offer to purchase, at face value
plus accrued interest, the Bridge Notes of any Bridge Note Holders who have not
agreed to execute an Approved Agreement by such date (the "HCF Purchase
Commitment.")

     4. The extension of the HCF Notes as set forth in Item 3 (i) and the HCF
Purchase Commitment as set forth in Item 3 (ii) are conditioned upon (i) the
closing of COI's IPO, (ii) the Bond closing, and (iii) the absence of a
declaration of default by the Trustee under the Bonds.

     5. HCF shall have the right to review and approve any public announcement
or public filing made after the date hereof relating to any of the transactions
contemplated hereby or relating to HCF or any of its affiliates, as the case may
be, before any such announcement or filing is made (such approval not to be
unreasonably withheld or delayed).

     6. This Extension Letter shall be governed by and construed in accordance
with the laws of the State of Delaware without reference to the conflicts or
choice of laws principles thereof. HCF and COI each agree to submit to the
jurisdiction of the state and Federal courts located in the state of Delaware.
Each of us hereby irrevocably waives all right to trial by jury in any action,
proceeding or counterclaim (whether based on contract, tort or otherwise)
arising out of or relating to this Extension Letter.

     7. This Extension Letter may be executed in any number of counterparts,
each of which shall be an original, and all of which, when taken together, shall
constitute one agreement. Delivery of an executed signature page of this
Commitment Letter by facsimile transmission shall be effective as a delivery of
a manually executed counterpart hereof.

     8. This Extension Letter may not be amended or any provision hereof waived
or modified except by an instrument in writing signed by HCF and COI.

     9. This Extension Letter may not be assigned by COI without the prior
written consent of HCF (and any purported assignment without such consent shall
be null and void).

Very truly yours,

High Capital Funding, LLC

By:    /s/ Fred A. Brasch
Name:  Fred A. Brasch
Title: Chief Financial Officer

                                       2
<PAGE>

Accepted and agreed:

Converted Organics Inc.

By:    /s/ Edward J. Gildea
Name:  Edward J. Gildea
Title: President

                                       3
<PAGE>

                                   Schedule A

                         High Capital Funding, LLC Notes

<Table>
<Caption>
          INVESTMENT
             DATE      PRINCIPAL
          ----------   ---------
<S>                   <C>
          2-Mar-06     $500,000
         30-Oct-06     $100,000
          3-Jan-07     $ 50,000
                       --------
        TOTAL:         $650,000
                       ========
</Table>

                                       4
<PAGE>

                                   Schedule B

                                  Bridge Notes

<Table>
<Caption>
                                                                      INVESTMENT
                                                                         DATE          PRINCIPAL
                                                                      ----------       ---------
<S>                                                               <C>              <C>
     1  Lea Adar                                                        6-Jun-06     $     20,000
     2  Attar Family Ltd.                                              16-May-06     $     17,000
        Attar Family Ltd.                                               6-Jun-06     $     25,000
     3  Leslie Bardt                                                   16-May-06     $      5,000
     4  Richard Bassin                                                 16-May-06     $     25,000
        Richard Bassin                                                  6-Jun-06     $     15,000
     5  Marc and Ellen Becker Tenants in Common                        16-May-06     $     15,000
     6  Ronald J. Berk                                                  6-Jun-06     $     50,000
     7  Harriet Stone Berkowitz                                         6-Jun-06     $      5,000
     8  Morrell Berkowitz                                              16-May-06     $      5,000
     9  James & Carole Bos JTWROS                                      16-May-06     $      5,000
    10  Fred A. Brasch                                                  6-Jun-06     $     15,000
    11  Diana Budzanoski                                                6-Jun-06     $     10,000
    12  Bushrod Burns                                                  16-May-06     $     10,000
    13  Howard Commander                                                6-Jun-06     $     50,000
    14  Scott Commander                                                 6-Jun-06     $     10,000
    15  Barbara H & Peter R Ducoffe JTWROS                             16-May-06     $     25,000
    16  Herbert W. Eber                                                16-May-06     $      5,000
    17  Kenneth & Jocelin Elan JTWROS                                  16-May-06     $     15,000
    18  Neila & Lawrence B. Fisher JTWROS                               6-Jun-06     $     15,000
    19  J. David Forsyth                                               16-May-06     $     17,000
    20  Jack Franco                                                    16-May-06     $     10,000
    21  Scott C. Garber                                                16-May-06     $     10,000
    22  Stephen W. Garber                                              16-May-06     $     50,000
    23  Sonia Gluckman                                                 16-May-06     $     25,000
    24  Stephen M. Greenberg                                           16-May-06     $      5,000
    25  David R. Gross                                                 16-May-06     $     17,000
    26  Christen M. Hart                                                6-Jun-06     $      5,000
    27  Ellis T. & Reva S. Hart JTWROS                                  6-Jun-06     $      5,000
    28  Mary L. Hart                                                    6-Jun-06     $     50,000
    29  Hart Family Revocable Trust                                    16-May-06     $      5,000
    30  David & Joan Herskovits JTWROS                                 16-May-06     $     17,000
        David & Joan Herskovits JTWROS                                  6-Jun-06     $      3,000
    31  Insight Productions LLC                                        16-May-06     $      5,000
    32  Norman & Patty Johnson JTWROS                                   6-Jun-06     $      5,000
    33  Leslie & Barbara Kalmus JTWROS                                 16-May-06     $      5,000
    34  Gerald F. Kaplan                                               16-May-06     $     25,000
        Gerald F. Kaplan                                                6-Jun-06     $      5,000
    35  Jeffrey A. Kunkes, MD                                           6-Jun-06     $      5,000
    36  Gerald S. Leeseberg                                            16-May-06     $     25,000
        Gerald S. Leeseberg                                             6-Jun-06     $     10,000
    37  Michael G. Leff                                                 6-Jun-06     $     10,000
    38  Jeffrey J. Leon                                                16-May-06     $     10,000
</TABLE>

                                       5
<PAGE>

<Table>
<S>                                                               <C>              <C>
    39  James M. Libby, MD                                              6-Jun-06     $     20,000
    40  Stanley C. Lipton                                              16-May-06     $     10,000
    41  Edgar O. Mandeville                                             6-Jun-06     $      5,000
    42  Melissa Manheim                                                 6-Jun-06     $      5,000
    43  Theresa Mari                                                    6-Jun-06     $      5,000
    44  Alexander Michaels                                             16-May-06     $     25,000
        Alexander Michaels                                              6-Jun-06     $     15,000
    45  James J. Noonan                                                16-May-06     $     17,000
    46  One Walton Place LLC                                           16-May-06     $     15,000
    47  Thomas J. & Irene M. Principe JTWROS                            6-Jun-06     $     10,000
    48  David A. Rapaport                                              16-May-06     $     25,000
    49  Phyllis Rodbell                                                16-May-06     $      5,000
    50  Neil S. & Susan Hart Sandler JTWROS                             6-Jun-06     $      5,000
    51  Sidney & Carol Strickland JTWROS                               16-May-06     $     17,000
    52  Tall Oaks Group, LLC                                            6-Jun-06     $     50,000
    53  The David and Laura Owen Trust                                 16-May-06     $      5,000
    54  The Hart Organization Corp.                                     6-Jun-06     $     20,000
    55  Frances N. Veillette                                           16-May-06     $     10,000
    56  Jo Lynn and John Waller JTWROS                                 16-May-06     $     10,000
    57  Weiner Family Investments, LLC                                  6-Jun-06     $     50,000
    58  F. Kenneth Zadeck & Lisa Weiss JTWROS                          16-May-06     $     25,000
                                                                                     ------------
                                                                       TOTAL:        $  1,015,000
                                                                                     ============
</Table>

                                       6
<PAGE>

                                    Exhibit 1
                                       to
                              HCF Extension Letter

                        Converted Organics Bond Offering

                 Proposed Conditions -- OppenheimerFunds 2/01/07

     1.   8.00% Coupon - All or nothing order for $17.5 million of bonds

     2.   Final maturity on July 1, 2027. Interest only through 2012; first
          annual sinking fund payment due July 1, 2013.

     3.   Optional redemption: 7/01/17 at 106%, 7/01/18 at 103%, & 7/01/19 at
          100%.

     4.   Unpaid interest continues to accrue interest at the 8.00% coupon.

     5.   DSR equal to $1.75 million.

     6.   The minimum level of working capital available from bond proceeds on
          the Woodbridge balance sheet is $3.255 million as according to the
          latest FBW distribution.

     7.   The minimum level of required cash at Converted Organics Inc., post
          IPO and after all payables are brought current, is $3.50 million.
          [Note, assuming $2.15 million of "Development Capital" per the IPO
          documentation, then the cash needed through bridge loan extensions or
          other methods must equal $1.35 million.] Any working capital obtained
          via bridge loans or other agreements may not pay and must accrue
          interest and principal until EBITDA / MADS exceeds 1.2x over a 12
          month rolling average.

     8.   Corporate guaranty of the bonds by Converted Organics Inc. until
          EBITDA / MADS > 1.2x over one fiscal year (confirmed by audit).

     9.   No distributions to Converted Organics Inc. until EBITDA / MADS > 1.5x
          over one fiscal year period (confirmed by audit).

     10.  Maintenance reserve fully funded prior to distributions to Converted
          Organics Inc is $1.2 million.

     11.  OppenheimerFunds receives a right of first refusal on any new
          tax-exempt financing by Woodbridge, Converted Organics Inc. or any of
          its affiliates.

                                       7<PAGE>

                                                                   EXHIBIT 10.1E

                                David A. Rapaport
                                 Attorney at Law
                       333 Sandy Springs Circle, Suite 230
                                Atlanta, GA 30328
                      TEL (404) 257-9150 FAX (404) 257-9125

                                                           Admitted in GA and NY

February 7, 2007

Converted Organics Inc
7A Commercial Wharf West
Boston, MA 02110

Attention:        Edward J. Gildea
                  President and CEO

Re:     Note Extensions

Dear Ed:

This letter is to confirm that as of today, February 7, 2007:

1. I have received signed letters in the form of Exhibit 1 hereto, ("Bridge Note
Extension Letter"), for an aggregate of $843,000 principal amount, from each of
the holders of Converted Organics Inc.'s notes listed on Schedule 1 hereto The
notes listed on Schedule 1 hereto and Schedule 2 hereto are referred to as the
"Bridge Notes."

2. In accordance with the terms of the Bridge Note Extension Letter, I hereby
extend the Maturity Date of the Bridge Notes held by the persons listed on
Schedule 1 to March 19, 2007, and upon receipt of Bridge Note Extension Letters
from the persons listed on Schedule 2, I hereby extend the Maturity Date of
those Bridge Notes to March 19, 2007 as well.

3. I have the right under the Bridge Note Extension Letters to further extend
the Maturity Date of the Bridge Notes to April 19, 2007; I shall do so if such
action is required to avoid a default under any of the Bridge Notes listed on
Schedule 1 and for the Bridge Notes listed on Schedule 2 for which I have a
signed Bridge Note Extension Letter.

Very truly yours,

/s/ David A. Rapaport

David A. Rapaport

<PAGE>

                                    Exhibit 1

Mr. Edward J. Gildea, President
Converted Organics Inc.
7A Commercial Wharf West
Boston, MA 02210

January 12, 2007

Re: April 11, 2006 FINANCING TERMS AGREEMENT

Dear Mr. Gildea:

         This letter confirms that the COMPANY and the undersigned PURCHASER of
UNITS pursuant to the above-referenced FINANCING TERMS AGREEMENT AND PURSUANT TO
THE EXTENSION LETTER DATED OCTOBER 16, 2006 (attached hereto as Exhibit A) agree
as follows (CAPITALIZED/ITALIC terms shall have the same meaning ascribed to
them in the FINANCING TERMS AGREEMENT):

         1. The MATURITY DATE is hereby extended to the earlier of February 19,
2007 or the closing of a PUBLIC OFFERING.

         2. The COMPANY's obligation to deliver ALTERNATE BRIDGE EQUITY UNITS in
the absence of a PUBLIC OFFERING is postponed to February 19, 2007.

         3. Up through February 19, 2007 the COMPANY at its option shall have
the right, but not the obligation, to pay the Bridge NOTES interest in PRIMARY
BRIDGE EQUITY UNITS (or ALTERNATE BRIDGE EQUITY UNITS, as the case may be). Any
PRIMARY BRIDGE EQUITY UNITS so issued shall be entitled to the same registration
rights set forth in the FINANCING TERMS AGREEMENT for all other PRIMARY BRIDGE
EQUITY UNITS.

         4. The undersigned hereby appoints David A. Rapaport, Esq. (Executive
Vice President and General Counsel of High Capital Finding, LLC) as his/her/its
Agent to permit up to two (2) 30-day Maturity Date extensions.

         Notwithstanding the MATURITY DATE extension, and the FINANCING TERMS
AGREEMENT AND THE EXTENSION LETTER DATED OCTOBER 16, 2006, the COMPANY agrees
that the interest rate on the BRIDGE NOTES shall be computed at the rate of 18%
per annum from October 16, 2006 to the date of payment in full of all interest
and principal on the BRIDGE NOTES.

Very truly yours,

---------------------------------

Accepted and agreed:

Converted Organics Inc.

By:                                                  Date:
    ----------------------------------------               ---------------------
       Edward J. Gildea, President

                                       2
<PAGE>

                                   Schedule 1
           List of Converted Organics Bridge Investors, that executed
                             Jan 12, 2007 extension

<Table>
<Caption>
                                                INVESTMENT
                                                   DATE       PRINCIPAL
                                                ----------    ---------
<S>                                             <C>           <C>
 1  Lea Adar                                     6-Jun-06     $20,000
 2  Attar Family Ltd.                           16-May-06     $17,000
    Attar Family Ltd.                            6-Jun-06     $25,000
 3  Leslie Bardt                                16-May-06     $ 5,000
 4  Richard Bassin                              16-May-06     $25,000
    Richard Bassin                               6-Jun-06     $15,000
 5  Marc and Ellen Becker Tenants in Common     16-May-06     $15,000
 6  Ronald J. Berk                               6-Jun-06     $50,000
 7  Morrell Berkowitz                           16-May-06     $ 5,000
 8  James & Carole Bos JTWROS                   16-May-06     $ 5,000
 9  Fred A. Brasch                               6-Jun-06     $15,000
10  Diana Budzanoski                             6-Jun-06     $10,000
11  Bushrod Burns                               16-May-06     $10,000
12  Howard Commander                             6-Jun-06     $50,000
13  Scott Commander                              6-Jun-06     $10,000
14  Herbert W. Eber                             16-May-06     $ 5,000
15  Kenneth & Jocelin Elan JTWROS               16-May-06     $15,000
16  J. David Forsyth                            16-May-06     $17,000
17  Jack Franco                                 16-May-06     $10,000
18  Scott C. Garber                             16-May-06     $10,000
19  Stephen W. Garber                           16-May-06     $50,000
20  Sonia Gluckman                              16-May-06     $25,000
21  Stephen M. Greenberg                        16-May-06     $ 5,000
22  Christen M. Hart                             6-Jun-06     $ 5,000
23  Ellis T. & Reva S. Hart JTWROS               6-Jun-06     $ 5,000
24  Mary L. Hart                                 6-Jun-06     $50,000
25  Hart Family Revocable Trust                 16-May-06     $ 5,000
26  David & Joan Herskovits JTWROS              16-May-06     $17,000
    David & Joan Herskovits JTWROS               6-Jun-06     $ 3,000
27  Insight Productions LLC                     16-May-06     $ 5,000
28  Norman & Patty Johnson JTWROS                6-Jun-06     $ 5,000
29  Leslie & Barbara Kalmus JTWROS              16-May-06     $ 5,000
30  Michael G. Leff                              6-Jun-06     $10,000
31  Jeffrey J. Leon                             16-May-06     $10,000
32  Stanley C. Lipton                           16-May-06     $10,000
33  Edgar O. Mandeville                          6-Jun-06     $ 5,000
34  Melissa Manheim                              6-Jun-06     $ 5,000
35  Alexander Michaels                          16-May-06     $25,000
    Alexander Michaels                           6-Jun-06     $15,000
36  James J. Noonan                             16-May-06     $17,000
37  Thomas J. & Irene M. Principe JTWROS         6-Jun-06     $10,000
38  David A. Rapaport                           16-May-06     $25,000
</TABLE>

                                       3
<PAGE>

<Table>
<S>                                             <C>           <C>
39  Phyllis Rodbell                             16-May-06    $  5,000
40  Neil S. & Susan Hart Sandler JTWROS          6-Jun-06    $  5,000
41  Sidney & Carol Strickland JTWROS            16-May-06    $ 17,000
42  Tall Oaks Group, LLC                         6-Jun-06    $ 50,000
43  The David and Laura Owen Trust              16-May-06    $  5,000
44  The Hart Organization Corp.                  6-Jun-06    $ 20,000
45  Frances N. Veillette                        16-May-06    $ 10,000
46  Jo Lynn and John Waller JTWROS              16-May-06    $ 10,000
47  Weiner Family Investments, LLC               6-Jun-06    $ 50,000
48  F. Kenneth Zadeck & Lisa Weiss JTWROS       16-May-06    $ 25,000
                                                             --------
                                                TOTAL:       $843,000
                                                             ========
</Table>

                                       4
<PAGE>

                                   Schedule 2

       List of Converted Organics Bridge Investors, that have not executed
                             Jan 12, 2007 extension

<Table>
<Caption>
                                                         INVESTMENT
                                                            DATE      PRINCIPAL
                                                         ----------   ----------
<S>                                                      <C>          <C>
Harriet Stone  Berkowitz                                  6-Jun-06     $  5,000
Barbara H & Peter R  Ducoffe  JTWROS                     16-May-06     $ 25,000
Neila & Lawrence B.  Fisher JTWROS                        6-Jun-06     $ 15,000
David R. Gross                                           16-May-06     $ 17,000
Gerald F. Kaplan                                         16-May-06     $ 25,000
Gerald F. Kaplan                                          6-Jun-06     $  5,000
Jeffrey A. Kunkes, MD                                     6-Jun-06     $  5,000
Gerald  S. Leeseberg                                     16-May-06     $ 25,000
Gerald  S. Leeseberg                                      6-Jun-06     $ 10,000
James  M. Libby, MD                                       6-Jun-06     $ 20,000
Theresa  Mari                                             6-Jun-06     $  5,000
One Walton Place LLC                                     16-May-06     $ 15,000
                                                                      ----------
                                                         TOTAL:        $172,000
                                                                      ==========
</Table>

                                       5

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