Oxathiaborolium-catalyzed enantioselective [2 + 2] cycloadditions
Mukhopadhyay, Soumendranath; Boobalan, Ramalingam; Chein, Rong-Jie; Organic & Biomolecular Chemistry  (2022) –; doi:10.1039/D2OB01779B

data_7158937
_publ_section_title
;
 Oxathiaborolium-catalyzed enantioselective [2 + 2] cycloadditions
;
_journal_name_full               'Organic &amp; Biomolecular Chemistry'
_journal_paper_doi               10.1039/D2OB01779B
_journal_year                    2022
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C23 H33 N O3 Si'
_chemical_formula_sum            'C23 H33 N O3 Si'
_chemical_formula_weight         399.59
_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
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2021-05-11 deposited with the CCDC.	2022-10-10 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.3096(2)
_cell_length_b                   12.9213(4)
_cell_length_c                   26.6212(8)
_cell_measurement_reflns_used    9885
_cell_measurement_temperature    100.0(2)
_cell_measurement_theta_max      72.27
_cell_measurement_theta_min      3.8
_cell_volume                     2170.38(12)
_computing_cell_refinement       'SAINT V8.40A (Bruker Nano, Inc., 2019)'
_computing_data_collection       'Bruker Instrument Service v2012.12.0.3'
_computing_data_reduction        'SAINT V8.40A (Bruker Nano, Inc., 2019)'
_computing_molecular_graphics    'shelXle (C.B. Huebschle, rev 958)'
_computing_publication_material  'WinGX publication routines (Farrugia, 2014)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100.0(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.1278
_diffrn_reflns_av_unetI/netI     0.0445
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            46023
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        66.583
_diffrn_reflns_theta_max         66.583
_diffrn_reflns_theta_min         3.802
_exptl_absorpt_coefficient_mu    1.132
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.8054
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'Bruker SADABS, 1996'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.223
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       niddle
_exptl_crystal_F_000             864
_exptl_crystal_size_max          0.245
_exptl_crystal_size_mid          0.173
_exptl_crystal_size_min          0.117
_refine_diff_density_max         0.213
_refine_diff_density_min         -0.264
_refine_diff_density_rms         0.042
_refine_ls_abs_structure_details
;
 Flack x determined using 1418 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.029(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     258
_refine_ls_number_reflns         3844
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0357
_refine_ls_R_factor_gt           0.0320
_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^)+(0.0467P)^2^+0.0435P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0824
_refine_ls_wR_factor_ref         0.0840
_reflns_Friedel_coverage         0.716
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                3550
_reflns_number_total             3844
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2ob01779b2.cif
_cod_data_source_block           i17962
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_crystal_density_meas' value 'none' was changed to
'?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 
;
_cod_database_code               7158937
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.769
_shelx_estimated_absorpt_t_max   0.879
_shelx_res_checksum              20497