Highly Stereoselective Nickel-Catalyzed Difluoroalkylation of Aryl Ketones to Tetrasubstituted Monofluoroalkenes and Quaternary Alkyl Difluorides
Li, Chao; Cao, Yi-Xuan; Jin, Ruoxing; Bian, Kang-Jie; Qin, Zi-Yang; Lan, Quan; Wang, Xi-Sheng; Chemical Science  (2019) –; doi:10.1039/C9SC02806D

data_1552251
_publ_section_title
;
 Highly Stereoselective Nickel-Catalyzed Difluoroalkylation of Aryl
 Ketones to Tetrasubstituted Monofluoroalkenes and Quaternary Alkyl
 Difluorides
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/C9SC02806D
_journal_year                    2019
_chemical_absolute_configuration ad
_chemical_formula_sum            'C28 H20 F N O2'
_chemical_formula_weight         421.45
_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
_audit_creation_method           SHELXL-2013
_audit_update_record
;
2017-07-27 deposited with the CCDC.    2019-08-19 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.9409(2)
_cell_length_b                   10.8429(2)
_cell_length_c                   32.9352(5)
_cell_measurement_reflns_used    6944
_cell_measurement_temperature    291(2)
_cell_measurement_theta_max      71.2520
_cell_measurement_theta_min      4.2800
_cell_volume                     2121.57(9)
_computing_cell_refinement       'CrysAlisPro (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro (Rigaku OD, 2015)'
_computing_molecular_graphics    'Ortep-3 (L. J. Farrugia, 2001)'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      291(2)
_diffrn_detector_area_resol_mean 5.2169
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.971
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, AtlasS2'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0279
_diffrn_reflns_av_unetI/netI     0.0247
_diffrn_reflns_Laue_measured_fraction_full 0.990
_diffrn_reflns_Laue_measured_fraction_max 0.971
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       40
_diffrn_reflns_limit_l_min       -40
_diffrn_reflns_number            10995
_diffrn_reflns_point_group_measured_fraction_full 0.990
_diffrn_reflns_point_group_measured_fraction_max 0.962
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         71.267
_diffrn_reflns_theta_min         4.293
_diffrn_source                   'micro-focus sealed X-ray tube'
_exptl_absorpt_coefficient_mu    0.718
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.65218
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.46 (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_density_diffrn    1.319
_exptl_crystal_description       block
_exptl_crystal_F_000             880
_exptl_crystal_size_max          0.230
_exptl_crystal_size_mid          0.220
_exptl_crystal_size_min          0.220
_refine_diff_density_max         0.145
_refine_diff_density_min         -0.201
_refine_diff_density_rms         0.035
_refine_ls_abs_structure_details
;
 Flack x determined using 1494 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   0.06(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.020
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     289
_refine_ls_number_reflns         3964
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.0457
_refine_ls_R_factor_gt           0.0438
_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^)+(0.0294P)^2^+1.2011P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1031
_refine_ls_wR_factor_ref         0.1041
_reflns_Friedel_coverage         0.691
_reflns_Friedel_fraction_full    0.989
_reflns_Friedel_fraction_max     0.948
_reflns_number_gt                3831
_reflns_number_total             3964
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9sc02806d2.cif
_cod_data_source_block           shelxl_CCDC1
_cod_database_code               1552251
_shelx_estimated_absorpt_t_min   0.852
_shelx_estimated_absorpt_t_max   0.858
_shelxl_version_number           2013-4
_shelx_res_checksum              60190