Catalytic asymmetric synthesis of pyrrolidine derivatives bearing heteroatom-substituted quaternary stereocenters
Wang, Zhi-Peng; Wu, Qi; Jiang, Jia; Li, Zi-Rui; Peng, Xiao-Jiao; Shao, Pan-Lin; He, Yun; Organic Chemistry Frontiers 5 (2018) 36–; doi:10.1039/C7QO00692F

data_1553874
_publ_section_title
;
 Catalytic asymmetric synthesis of pyrrolidine derivatives bearing
 heteroatom-substituted quaternary stereocenters
;
_journal_issue                   1
_journal_name_full               'Organic Chemistry Frontiers'
_journal_page_first              36
_journal_paper_doi               10.1039/C7QO00692F
_journal_volume                  5
_journal_year                    2018
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C21 H24 N2 O6 S'
_chemical_formula_sum            'C21 H24 N2 O6 S'
_chemical_formula_weight         432.48
_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   mixed
_atom_sites_solution_primary     direct
_audit_creation_date             2017-03-08
_audit_creation_method
;
Olex2 1.2-alpha
(compiled 2017.03.02 svn.r3394 for OlexSys, GUI svn.r5324)
;
_audit_update_record
;
2017-03-18 deposited with the CCDC.
2017-09-18 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.9925(3)
_cell_length_b                   13.9906(4)
_cell_length_c                   19.0487(6)
_cell_measurement_reflns_used    10419
_cell_measurement_temperature    292(2)
_cell_measurement_theta_max      27.1560
_cell_measurement_theta_min      3.6000
_cell_volume                     2130.02(12)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'SIR2004 (Burla et al., 2007)'
_diffrn_ambient_temperature      292(2)
_diffrn_detector_area_resol_mean 16.0892
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'SuperNova, Single source at offset, Eos'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0357
_diffrn_reflns_av_unetI/netI     0.0232
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            29209
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         26.372
_diffrn_reflns_theta_min         3.327
_diffrn_source                   'micro-focus sealed X-ray tube'
_exptl_absorpt_coefficient_mu    0.192
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.57438
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.41k (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.349
_exptl_crystal_description       Block
_exptl_crystal_F_000             912
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.248
_refine_diff_density_min         -0.467
_refine_diff_density_rms         0.093
_refine_ls_abs_structure_details
;
 Flack x determined using 1539 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.00(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.113
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     279
_refine_ls_number_reflns         4342
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.113
_refine_ls_R_factor_all          0.0451
_refine_ls_R_factor_gt           0.0389
_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^)+(0.0505P)^2^+0.3011P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0939
_refine_ls_wR_factor_ref         0.0980
_reflns_Friedel_coverage         0.752
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                3890
_reflns_number_total             4342
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7qo00692f2.cif
_cod_data_source_block           c21h24n2o6s
_cod_original_cell_volume        2130.03(12)
_cod_database_code               1553874
_shelx_shelxl_version_number     2014/7
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C8(H8A,H8B)
2.b Aromatic/amide H refined with riding coordinates:
 C4(H4), C6(H6), C5(H5), C3(H3), C21(H21), C18(H18), C17(H17), C19(H19),
 C20(H20)
2.c Idealised Me refined as rotating group:
 C10(H10A,H10B,H10C), C12(H12A,H12B,H12C), C15(H15A,H15B,H15C), C1(H1A,H1B,H1C)
;
_olex2_submission_special_instructions 'No special instructions were received'