Enantioselective Copper-Catalyzed Alkynylation of Benzylic C-H Bonds via Radical Relay.
Fu, Liang; Zhang, Zhihan; Chen, Pinhong; Lin, Zhenyang; Liu, Guosheng; Journal of the American Chemical Society  (2020) –; doi:10.1021/jacs.0c05373

data_4135097
_publ_section_title
;
 Enantioselective Copper-Catalyzed Alkynylation of Benzylic C-H Bonds via
 Radical Relay.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_paper_doi               10.1021/jacs.0c05373
_journal_year                    2020
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C20 H21 N S Si'
_chemical_formula_sum            'C20 H21 N S Si'
_chemical_formula_weight         335.53
_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             2019-07-17
_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                   9.5614(2)
_cell_length_b                   26.9394(5)
_cell_length_c                   7.32500(10)
_cell_measurement_reflns_used    9971
_cell_measurement_temperature    170(2)
_cell_measurement_theta_max      54.97
_cell_measurement_theta_min      4.27
_cell_volume                     1886.76(6)
_computing_cell_refinement       'SAINT v8.37A (Bruker, 2015)'
_computing_data_reduction        'SAINT v8.37A (Bruker, 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_temperature      169.97
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker D8 Venture'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           GaK\a
_diffrn_radiation_wavelength     1.34139
_diffrn_reflns_av_R_equivalents  0.0626
_diffrn_reflns_av_unetI/netI     0.0452
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       -32
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            20486
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        53.594
_diffrn_reflns_theta_max         54.961
_diffrn_reflns_theta_min         4.269
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.367
_exptl_absorpt_correction_T_max  0.7508
_exptl_absorpt_correction_T_min  0.5859
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1627 before and 0.0797 after correction.
The Ratio of minimum to maximum transmission is 0.7804.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.181
_exptl_crystal_description       block
_exptl_crystal_F_000             712
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.228
_refine_diff_density_min         -0.291
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details
;
 Flack x determined using 1178 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.036(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.092
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     212
_refine_ls_number_reflns         3571
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.092
_refine_ls_R_factor_all          0.0472
_refine_ls_R_factor_gt           0.0391
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0268P)^2^+0.5537P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0798
_refine_ls_wR_factor_ref         0.0833
_reflns_Friedel_coverage         0.718
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.995
_reflns_number_gt                3231
_reflns_number_total             3571
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja0c05373_si_004.cif
_cod_data_source_block           mj19475
_cod_database_code               4135097
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.899
_shelx_estimated_absorpt_t_min   0.853
_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)
2.b Aromatic/amide H refined with riding coordinates:
 C6(H6), C7(H7), C8(H8), C13(H13), C14(H14), C15(H15), C16(H16), C17(H17)
2.c Idealised Me refined as rotating group:
 C4(H4A,H4B,H4C), C18(H18A,H18B,H18C), C19(H19A,H19B,H19C), C20(H20A,H20B,H20C)
;
_shelx_res_checksum              12542
_shelx_hkl_checksum              30094
_olex2_submission_special_instructions 'No special instructions were received'