Synthesis of Silicon-Stereogenic Silanols Involving Iridium-Catalyzed Enantioselective C‒H Silylation Leading to a New Ligand Scaffold
Zhang, Hongpeng; Zhao, Dongbing; ACS Catalysis  (2021) 10748–10753; doi:10.1021/acscatal.1c03112

data_4518971
_publ_section_title
;
 Synthesis of Silicon-Stereogenic Silanols Involving Iridium-Catalyzed
 Enantioselective C--H Silylation Leading to a New Ligand Scaffold
;
_journal_name_full               'ACS Catalysis'
_journal_page_first              10748
_journal_page_last               10753
_journal_paper_doi               10.1021/acscatal.1c03112
_journal_year                    2021
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C21 H28 O Si2'
_chemical_formula_sum            'C21 H28 O Si2'
_chemical_formula_weight         352.61
_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             2021-01-08
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.5446(3)
_cell_length_b                   10.3457(3)
_cell_length_c                   22.8129(6)
_cell_measurement_reflns_used    16824
_cell_measurement_temperature    113.15
_cell_measurement_theta_max      32.8660
_cell_measurement_theta_min      2.1100
_cell_volume                     2016.66(11)
_computing_cell_refinement       'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_data_collection       CrystalClear(Rigaku,2008)
_computing_data_reduction        'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_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_temperature      113.15
_diffrn_detector                 'CCD plate'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.954
_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   -115.00  65.00   1.00    1.00    --  -25.00  45.00   0.00  180
  2  \w   -115.00  65.00   1.00    1.00    --  -25.00  45.00  90.00  180
  3  \w   -115.00  65.00   1.00    1.00    --  -25.00  45.00 180.00  180
;
_diffrn_measurement_device       'abstract diffractometer'
_diffrn_measurement_device_type  'Rigaku Saturn 70 CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      0.0547577000
_diffrn_orient_matrix_UB_12      -0.0062577000
_diffrn_orient_matrix_UB_13      -0.0231957000
_diffrn_orient_matrix_UB_21      0.0596286000
_diffrn_orient_matrix_UB_22      -0.0148126000
_diffrn_orient_matrix_UB_23      0.0205612000
_diffrn_orient_matrix_UB_31      -0.0183779000
_diffrn_orient_matrix_UB_32      -0.0666543000
_diffrn_orient_matrix_UB_33      -0.0024102000
_diffrn_radiation_monochromator  confocal
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0464
_diffrn_reflns_av_unetI/netI     0.0354
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.954
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            30562
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.928
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         32.853
_diffrn_reflns_theta_min         2.161
_diffrn_source                   'rotating anode'
_diffrn_source_type              'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.181
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.72647
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'CrysAlisPro 1.171.39.46 (Rigaku Oxford Diffraction, 2018)'
_exptl_crystal_density_diffrn    1.161
_exptl_crystal_description       block
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.297
_refine_diff_density_min         -0.250
_refine_diff_density_rms         0.045
_refine_ls_abs_structure_details
;
 Flack x determined using 2492 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.02(5)
_refine_ls_extinction_coef       0.0101(17)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     221
_refine_ls_number_reflns         6979
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0410
_refine_ls_R_factor_gt           0.0360
_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^)+(0.0417P)^2^+0.3018P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0857
_refine_ls_wR_factor_ref         0.0894
_reflns_Friedel_coverage         0.734
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.895
_reflns_number_gt                6390
_reflns_number_total             6979
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            cs1c03112_si_002.cif
_cod_data_source_block           r20210107d
_cod_database_code               4518971
_shelx_shelxl_version_number     2018/3
_chemical_oxdiff_formula         'C11 H10 N O'
_reflns_odcompleteness_completeness 99.83
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     26.32
_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 Secondary CH2 refined with riding coordinates:
 C17(H17A,H17B), C18(H18A,H18B), C19(H19A,H19B), C20(H20A,H20B), C21(H21A,H21B)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C5(H5), C6(H6), C12(H12), C13(H13), C14(H14), C15(H15)
2.c Idealised Me refined as rotating group:
 C8(H8A,H8B,H8C), C9(H9A,H9B,H9C), C10(H10A,H10B,H10C)
;
_shelx_res_checksum              2457
_shelx_hkl_checksum              38390
_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
- Detector area scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 1.289
_oxdiff_exptl_absorpt_empirical_full_min 0.744