Catalytic Enantioselective Boryl and Silyl Substitution with Trifluoromethyl Alkenes: Scope, Utility, and Mechanistic Nuances of Cu-F β-Elimination.
Paioti, Paulo H. S.; Del Pozo, Juan; Mikus, Malte S.; Lee, Jaehee; Koh, Ming Joo; Romiti, Filippo; Torker, Sebastian; Hoveyda, Amir H.; Journal of the American Chemical Society 141 (2019) 19917–19934; doi:10.1021/jacs.9b11382

data_4133903
_publ_section_title
;
 Catalytic Enantioselective Boryl and Silyl Substitution with
 Trifluoromethyl Alkenes: Scope, Utility, and Mechanistic Nuances of Cu-F
 \b-Elimination.
;
_journal_issue                   50
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              19917
_journal_page_last               19934
_journal_paper_doi               10.1021/jacs.9b11382
_journal_volume                  141
_journal_year                    2019
_chemical_absolute_configuration R
_chemical_formula_moiety         'C19 H19 F2 N O4 Si'
_chemical_formula_sum            'C19 H19 F2 N O4 Si'
_chemical_formula_weight         391.44
_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-2014/6
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.6591(3)
_cell_length_b                   7.0377(3)
_cell_length_c                   41.6610(16)
_cell_measurement_reflns_used    4866
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      66.66
_cell_measurement_theta_min      4.24
_cell_volume                     1952.43(14)
_computing_cell_refinement       'SAINT (Bruker, 2014)'
_computing_data_collection       'APEX2 (Bruker, 2014)'
_computing_data_reduction        'SAINT (Bruker, 2014)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/6 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXT 2014/6 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.974
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker Kappa DUO CCD diffractometer'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  mirrors
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0346
_diffrn_reflns_av_unetI/netI     0.0478
_diffrn_reflns_Laue_measured_fraction_full 0.974
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       49
_diffrn_reflns_limit_l_min       -45
_diffrn_reflns_number            7946
_diffrn_reflns_point_group_measured_fraction_full 0.971
_diffrn_reflns_point_group_measured_fraction_max 0.989
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         66.737
_diffrn_reflns_theta_min         2.121
_diffrn_source                   'microfocus sealed tube'
_diffrn_source_type              'Incoatec I\uS'
_exptl_absorpt_coefficient_mu    1.450
_exptl_absorpt_correction_T_max  0.7528
_exptl_absorpt_correction_T_min  0.5735
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Sheldrick, G.M. (2013). SADABS. Bruker AXS Inc. Madison, WI USA.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.332
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       sword
_exptl_crystal_F_000             816
_exptl_crystal_size_max          0.220
_exptl_crystal_size_mid          0.110
_exptl_crystal_size_min          0.080
_refine_diff_density_max         0.236
_refine_diff_density_min         -0.213
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details
;
 Flack x determined using 1224 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.03(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     246
_refine_ls_number_reflns         3429
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0422
_refine_ls_R_factor_gt           0.0388
_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^)+(0.0511P)^2^+0.3096P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1000
_refine_ls_wR_factor_ref         0.1025
_reflns_Friedel_coverage         0.678
_reflns_Friedel_fraction_full    0.966
_reflns_Friedel_fraction_max     0.985
_reflns_number_gt                3172
_reflns_number_total             3429
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja9b11382_si_005.cif
_cod_data_source_block           sad_a
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_crystal_density_meas' value 'not measured' 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               4133903
_shelx_estimated_absorpt_t_min   0.741
_shelx_estimated_absorpt_t_max   0.893
_exptl_absorpt_special_details
;
 ?
;
_shelxl_version_number           2014/6
_shelx_res_checksum              71156
_shelx_hkl_checksum              20565