A Bulky Chiral N-Heterocyclic Carbene Palladium Catalyst Enables Highly Enantioselective Suzuki-Miyaura Cross-Coupling Reactions for the Synthesis of Biaryl Atropisomers.
Shen, Di; Xu, Youjun; Shi, Shi-Liang; Journal of the American Chemical Society 141 (2019) 14938–14945; doi:10.1021/jacs.9b08578

data_4127634
_publ_section_title
;
 A Bulky Chiral N-Heterocyclic Carbene Palladium Catalyst Enables Highly
 Enantioselective Suzuki-Miyaura Cross-Coupling Reactions for the
 Synthesis of Biaryl Atropisomers.
;
_journal_issue                   37
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14938
_journal_page_last               14945
_journal_paper_doi               10.1021/jacs.9b08578
_journal_volume                  141
_journal_year                    2019
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C23 H20 O2'
_chemical_formula_sum            'C23 H20 O2'
_chemical_formula_weight         328.39
_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'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2019-02-25
_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                   7.5968(2)
_cell_length_b                   8.4886(2)
_cell_length_c                   27.1575(5)
_cell_measurement_reflns_used    9962
_cell_measurement_temperature    170(2)
_cell_measurement_theta_max      54.92
_cell_measurement_theta_min      6.81
_cell_volume                     1751.28(7)
_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      169.98
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_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  0.0334
_diffrn_reflns_av_unetI/netI     0.0198
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            21959
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        53.594
_diffrn_reflns_theta_max         54.891
_diffrn_reflns_theta_min         2.831
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.395
_exptl_absorpt_correction_T_max  0.7508
_exptl_absorpt_correction_T_min  0.6209
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1438 before and 0.0488 after correction. The Ratio of minimum to maximum transmission is 0.8241. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.245
_exptl_crystal_description       block
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.163
_refine_diff_density_min         -0.130
_refine_diff_density_rms         0.028
_refine_ls_abs_structure_details
;
 Flack x determined using 1345 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.02(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         3316
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0269
_refine_ls_R_factor_gt           0.0264
_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^)+(0.0370P)^2^+0.2431P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0703
_refine_ls_wR_factor_ref         0.0707
_reflns_Friedel_coverage         0.713
_reflns_Friedel_fraction_full    0.998
_reflns_Friedel_fraction_max     0.998
_reflns_number_gt                3260
_reflns_number_total             3316
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja9b08578_si_001.cif
_cod_data_source_block           mj19097_0m
_cod_database_code               4127634
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.954
_shelx_estimated_absorpt_t_min   0.932
_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:
 C21(H21A,H21B), C22(H22A,H22B)
2.b Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C5(H5), C6(H6), C7(H7), C8(H8), C13(H13), C14(H14),
 C15(H15), C16(H16), C18(H18), C19(H19)
2.c Idealised Me refined as rotating group:
 C23(H23A,H23B,H23C)
;
_shelx_res_checksum              60355
_shelx_hkl_checksum              83019
_olex2_submission_special_instructions 'No special instructions were received'