Formal Synthesis of (±)-Tetrodotoxin via the Oxidative Amidation of a Phenol: On the Structure of the Sato Lactone.
Xu, Sanjia; Ciufolini, Marco A.; Organic letters 17 (2015) 2424–2427; doi:10.1021/acs.orglett.5b00935

data_1520758
_publ_section_title
;
 Formal Synthesis of (+-)-Tetrodotoxin via the Oxidative Amidation of a
 Phenol: On the Structure of the Sato Lactone.
;
_journal_issue                   10
_journal_name_full               'Organic letters'
_journal_page_first              2424
_journal_page_last               2427
_journal_paper_doi               10.1021/acs.orglett.5b00935
_journal_volume                  17
_journal_year                    2015
_chemical_formula_moiety         'C22 H33 N O9'
_chemical_formula_sum            'C22 H33 N O9'
_chemical_formula_weight         455.49
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_audit_creation_date             2014-12-15
_audit_creation_method
;
Olex2 1.2
(compiled 2014.11.28 svn.r3106 for OlexSys, GUI svn.r4959)
;
_cell_angle_alpha                60.570(5)
_cell_angle_beta                 81.210(6)
_cell_angle_gamma                75.803(5)
_cell_formula_units_Z            2
_cell_length_a                   9.9044(10)
_cell_length_b                   11.8847(11)
_cell_length_c                   11.9608(11)
_cell_measurement_reflns_used    8716
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.06
_cell_measurement_theta_min      2.58
_cell_volume                     1187.9(2)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXT (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'Bruker APEX2 area detector'
_diffrn_detector_area_resol_mean 7.9
_diffrn_detector_type            'CCD area detector'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Bruker X8 APEX2 area detector'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0345
_diffrn_reflns_av_unetI/netI     0.0309
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.988
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            30781
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.988
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         30.243
_diffrn_reflns_theta_min         1.956
_diffrn_source                   'sealed X-ray tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_T_max  0.989
_exptl_absorpt_correction_T_min  0.880
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2014/4 (Bruker,2014/4) was used for absorption correction.
wR2(int) was 0.0577 before and 0.0460 after correction.
The Ratio of minimum to maximum transmission is 0.8897.
The \l/2 correction factor is 0.00150.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.273
_exptl_crystal_description       prism
_exptl_crystal_F_000             488
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.29
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.469
_refine_diff_density_min         -0.241
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.025
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     304
_refine_ls_number_reflns         6971
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.025
_refine_ls_R_factor_all          0.0504
_refine_ls_R_factor_gt           0.0383
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0523P)^2^+0.2634P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0963
_refine_ls_wR_factor_ref         0.1033
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5642
_reflns_number_total             6971
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol5b00935_si_004.cif
_cod_data_source_block           mc064
_cod_depositor_comments
;
The following automatic conversions were performed:

'_diffrn_radiation_probe' value 'X-ray' changed to 'x-ray' according
to
/usr/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 3271 2015-04-21 07:52:19Z andrius 
;
_cod_database_code               1520758
_shelxl_version_number           2014/6
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C4A(H4A), C5(H5), C7(H7), C8(H8), C9(H9)
2.b Secondary CH2 refined with riding coordinates:
 C11(H11A,H11B)
2.c Aromatic/amide H refined with riding coordinates:
 C4(H4)
2.d X=CH2 refined with riding coordinates:
 C12(H12A,H12B)
2.e Idealised Me refined as rotating group:
 C14(H14A,H14B,H14C), C15(H15A,H15B,H15C), C17(H17A,H17B,H17C), C18(H18A,H18B,
 H18C), C21(H21A,H21B,H21C), C22(H22A,H22B,H22C), C23(H23A,H23B,H23C)
;
_shelx_res_checksum              59385
_shelx_hkl_checksum              42432
_olex2_submission_special_instructions 'No special instructions were received'