Diastereoselectively Switchable Enantioselective Trapping of Carbamate Ammonium Ylides with Imines
Jun Jiang; Hua-Dong Xu; Jian-Bei Xi; Bai-Yan Ren; Feng-Ping Lv; Xin Guo; Li-Qin Jiang; Zhi-Yong Zhang; Wen-Hao Hu; Journal of the American Chemical Society 133 (2011) 8428–8431; doi:10.1021/ja201589k

data_4106192
_publ_section_title
;
 Diastereoselectively Switchable Enantioselective Trapping of Carbamate
 Ammonium Ylides with Imines
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              8428
_journal_page_last               8431
_journal_paper_doi               10.1021/ja201589k
_journal_volume                  133
_journal_year                    2011
_chemical_absolute_configuration ad
_chemical_formula_sum            'C30 H27 Br N2 O4'
_chemical_formula_weight         559.45
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 106.797(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.0469(8)
_cell_length_b                   16.2859(16)
_cell_length_c                   10.5311(10)
_cell_measurement_temperature    296(2)
_cell_volume                     1321.2(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0419
_diffrn_reflns_av_sigmaI/netI    0.0498
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            15157
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         2.02
_exptl_absorpt_coefficient_mu    1.594
_exptl_absorpt_correction_T_max  0.6295
_exptl_absorpt_correction_T_min  0.5340
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.406
_exptl_crystal_description       block
_exptl_crystal_F_000             576
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.32
_refine_diff_density_max         0.299
_refine_diff_density_min         -0.249
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.018(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     335
_refine_ls_number_reflns         4217
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.0536
_refine_ls_R_factor_gt           0.0370
_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^)+(0.0194P)^2^+0.4432P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0740
_refine_ls_wR_factor_ref         0.0814
_reflns_number_gt                3352
_reflns_number_total             4217
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja201589k_si_001.cif
_cod_data_source_block           z
_cod_database_code               4106192