Catalyst-controlled switch of regioselectivity in the asymmetric allylic alkylation of oxazolones with MBHCs
Zhu, Gongming; Yang, Junxian; Bao, Guangjun; Zhang, Ming; Li, Jing; Li, Yiping; Sun, Wangsheng; Hong, Liang; Wang, Rui; Chemical Communications 52 (2016) 7882–7885; doi:10.1039/c6cc03246j

data_7119377
_publ_section_title
;
 Catalyst-controlled switch of regioselectivity in the asymmetric allylic
 alkylation of oxazolones with MBHCs
;
_journal_issue                   50
_journal_name_full               'Chemical Communications'
_journal_page_first              7882
_journal_page_last               7885
_journal_paper_doi               10.1039/c6cc03246j
_journal_volume                  52
_journal_year                    2016
_chemical_absolute_configuration unk
_chemical_formula_sum            'C20 H15 Cl N2 O2'
_chemical_formula_weight         350.79
_chemical_name_systematic        3ca'
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_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     direct
_atom_sites_solution_secondary   difmap
_audit_block_doi                 10.5517/cc1kpyry
_audit_creation_method           SHELXL-97
_audit_update_record
;
2016-02-01 deposited with the CCDC.
2016-05-19 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.1740(7)
_cell_length_b                   14.3271(14)
_cell_length_c                   17.4194(17)
_cell_measurement_reflns_used    3659
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25.77
_cell_measurement_theta_min      2.74
_cell_volume                     1790.4(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART APEX II'
_computing_data_reduction        'Bruker SMART'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX II area detector'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0227
_diffrn_reflns_av_sigmaI/netI    0.0265
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            9147
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.84
_exptl_absorpt_coefficient_mu    0.228
_exptl_absorpt_correction_T_max  0.9558
_exptl_absorpt_correction_T_min  0.9347
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.301
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.116
_refine_diff_density_min         -0.160
_refine_diff_density_rms         0.035
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.01(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.004
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         3155
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.004
_refine_ls_R_factor_all          0.0328
_refine_ls_R_factor_gt           0.0280
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0240P)^2^+0.3449P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0632
_refine_ls_wR_factor_ref         0.0661
_reflns_number_gt                2865
_reflns_number_total             3155
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c6cc03246j2.cif
_cod_data_source_block           1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_absolute_configuration' value ' unk ' changed to 'unk'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 4624 2016-04-14 12:54:50Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7119377