Selective demethylation of <i>O</i>-aryl glycosides by iridium-catalyzed hydrosilylation.
Jones, Caleb A. H.; Schley, Nathan D.; Chemical communications (Cambridge, England) 57 (2021) 5953–5956; doi:10.1039/d1cc00496d

data_7128331
_publ_section_title
;
 Selective demethylation of <i>O</i>-aryl glycosides by iridium-catalyzed
 hydrosilylation.
;
_journal_issue                   48
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              5953
_journal_page_last               5956
_journal_paper_doi               10.1039/d1cc00496d
_journal_volume                  57
_journal_year                    2021
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C19 H30 O5'
_chemical_formula_sum            'C19 H30 O5'
_chemical_formula_weight         338.43
_chemical_name_systematic
(2?-t-butylphenyl)-2,3,4-tri-O-methyl-\a-L-rhamnopyranoside
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2019-10-30
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2021-01-28 deposited with the CCDC.	2021-05-18 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.71828(6)
_cell_length_b                   13.89043(10)
_cell_length_c                   17.59797(13)
_cell_measurement_reflns_used    11413
_cell_measurement_temperature    100.00(10)
_cell_measurement_theta_max      73.2480
_cell_measurement_theta_min      4.0280
_cell_volume                     1886.68(2)
_computing_cell_refinement       'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      100.00(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.1506
_diffrn_detector_type            EosS2
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
  1  \w   -104.00 -20.00   1.00    1.00    --  -37.09 -57.00-120.00   84
  2  \w   -108.00  -8.00   1.00    1.00    --  -37.09 -19.00 150.00  100
  3  \w    -66.00  34.00   1.00    1.00    --  -37.09  19.00  60.00  100
  4  \w    -90.00  -2.00   1.00    1.00    --  -37.09 125.00  60.00   88
  5  \w     23.00  90.00   1.00    1.00    --   37.09-125.00 -60.00   67
  6  \w      1.00  76.00   1.00    1.00    --   37.09 -99.00  30.00   75
  7  \w     10.00 105.00   1.00    1.00    --   37.09  77.00 -60.00   95
  8  \w     42.00 109.00   1.00    2.48    --  111.00 -94.00 -60.00   67
  9  \w     43.00 128.00   1.00    2.48    --  111.00 -45.00  60.00   85
 10  \w     43.00 128.00   1.00    2.48    --  111.00 -45.00-120.00   85
 11  \w     84.00 178.00   1.00    2.48    --  111.00  77.00  60.00   94
 12  \w     57.00 150.00   1.00    2.48    --  111.00 178.00 150.00   93
 13  \w    100.00 178.00   1.00    2.48    --  111.00 111.00-120.00   78
 14  \w     44.00 129.00   1.00    2.48    --  111.00 -61.00 -90.00   85
 15  \w   -105.00 -10.00   1.00    1.00    --  -37.09 -77.00-150.00   95
 16  \w   -105.00 -10.00   1.00    1.00    --  -37.09 -77.00  30.00   95
 17  \w   -105.00 -10.00   1.00    1.00    --  -37.09 -77.00 120.00   95
 18  \w    -54.00  30.00   1.00    1.00    --  -37.09  57.00 -60.00   84
 19  \w     18.00 106.00   1.00    1.00    --   37.09  38.00  90.00   88
 20  \w    -32.00  56.00   1.00    1.00    --   37.09 -38.00 150.00   88
 21  \w     84.00 178.00   1.00    2.48    --  111.00  77.00   0.00   94
 22  \w     42.00 109.00   1.00    2.48    --  111.00 -94.00-180.00   67
 23  \w     73.00 178.00   1.00    2.48    --  111.00  15.00 -60.00  105
 24  \w     73.00 118.00   1.00    2.48    --  111.00  15.00  30.00   45
 25  \w     73.00 178.00   1.00    2.48    --  111.00  15.00-180.00  105
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, EosS2'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      -0.1464574000
_diffrn_orient_matrix_UB_12      -0.0751539000
_diffrn_orient_matrix_UB_13      -0.0047871000
_diffrn_orient_matrix_UB_21      -0.1290164000
_diffrn_orient_matrix_UB_22      0.0744257000
_diffrn_orient_matrix_UB_23      0.0318047000
_diffrn_orient_matrix_UB_31      -0.0417386000
_diffrn_orient_matrix_UB_32      0.0334490000
_diffrn_orient_matrix_UB_33      -0.0814018000
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0280
_diffrn_reflns_av_unetI/netI     0.0201
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            18243
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.991
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         73.444
_diffrn_reflns_theta_min         4.055
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.689
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.837
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.46 (Rigaku Oxford Diffraction, 2015)
Numerical absorption correction based on gaussian integration over
			a multifaceted crystal model
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.191
_exptl_crystal_description       block
_exptl_crystal_F_000             736
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent'
_exptl_crystal_size_max          0.156
_exptl_crystal_size_mid          0.094
_exptl_crystal_size_min          0.083
_refine_diff_density_max         0.194
_refine_diff_density_min         -0.155
_refine_diff_density_rms         0.031
_refine_ls_abs_structure_details
;
 Flack x determined using 1506 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.04(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     224
_refine_ls_number_reflns         3759
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0290
_refine_ls_R_factor_gt           0.0279
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0383P)^2^+0.2886P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0701
_refine_ls_wR_factor_ref         0.0708
_reflns_Friedel_coverage         0.735
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.986
_reflns_number_gt                3647
_reflns_number_total             3759
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1cc00496d3.cif
_cod_data_source_block           2c
_cod_depositor_comments
'Adding full bibliography for 7128327--7128332.cif.'
_cod_database_code               7128331
_shelx_shelxl_version_number     2018/1
_chemical_oxdiff_formula         C19H30O5
_reflns_odcompleteness_completeness 100.00
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     68.13
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C4(H4), C5(H5)
2.b Aromatic/amide H refined with riding coordinates:
 C9(H9), C10(H10), C11(H11), C12(H12)
2.c Idealised Me refined as rotating group:
 C6(H6A,H6B,H6C), C14(H14A,H14B,H14C), C15(H15A,H15B,H15C), C16(H16A,H16B,
 H16C), C17(H17A,H17B,H17C), C18(H18A,H18B,H18C), C19(H19A,H19B,H19C)
;
_shelx_res_checksum              97972
_shelx_hkl_checksum              51136
_olex2_date_sample_data_collection 2019-10-24
_olex2_exptl_crystal_mounting_method 'mounted in a polyimide loop'
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 1.153
_oxdiff_exptl_absorpt_empirical_full_min 0.878