A Regio- and Stereoselective Approach to Quaternary Centers from Chiral Trisubstituted Aziridines
Erin M. Forbeck; Cory D. Evans; John A. Gilleran; Pixu Li; Madeleine M. Joullié; Journal of the American Chemical Society 129 (2007) 14463–14469; doi:10.1021/ja0758077

data_4110173
_publ_section_title
;
 A Regio- and Stereoselective Approach to Quaternary Centers from Chiral
 Trisubstituted Aziridines
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14463
_journal_page_last               14469
_journal_paper_doi               10.1021/ja0758077
_journal_volume                  129
_journal_year                    2007
_chemical_formula_sum            'C25 H31 N3 O6 S Si'
_chemical_formula_weight         529.68
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      19
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.4164(8)
_cell_length_b                   10.6920(8)
_cell_length_c                   25.187(2)
_cell_measurement_temperature    143(1)
_cell_volume                     2805.1(4)
_computing_data_collection       'CrystalClear (Rigaku, 1999)'
_computing_data_reduction        'CrystalClear (Rigaku, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare, 1999)'
_diffrn_ambient_temperature      143(1)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       'CCD Area Detector'
_diffrn_measurement_device_type  'Rigaku Mercury'
_diffrn_measurement_method       'phi and omega rotations'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0279
_diffrn_reflns_av_sigmaI/netI    0.0424
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            12701
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         2.50
_exptl_absorpt_coefficient_mu    0.200
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8167
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_density_diffrn    1.254
_exptl_crystal_F_000             1120
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.153
_refine_diff_density_min         -0.242
_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   -0.01(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.090
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     332
_refine_ls_number_reflns         4925
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.090
_refine_ls_R_factor_all          0.0426
_refine_ls_R_factor_gt           0.0368
_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^)+(0.0333P)^2^+0.3712P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0754
_refine_ls_wR_factor_ref         0.0796
_reflns_number_gt                4515
_reflns_number_total             4925
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0758077si20070808_043056.cif
_cod_data_source_block           shelxl
_cod_original_sg_symbol_H-M      'P 21 21 21 '
_cod_database_code               4110173