Direct organocatalytic asymmetric aldol reaction of alpha-isothiocyanato imides to alpha-ketoesters under low ligand loading: a doubly stereocontrolled approach to cyclic thiocarbamates bearing chiral quaternary stereocenters.
Jiang, Xianxing; Zhang, Gen; Fu, Dan; Cao, Yiming; Shen, Fangfang; Wang, Rui; Organic letters 12 (2010) 1544–1547; doi:10.1021/ol1002829

data_1502899
_publ_section_title
;
 Direct organocatalytic asymmetric aldol reaction of alpha-isothiocyanato
 imides to alpha-ketoesters under low ligand loading: a doubly
 stereocontrolled approach to cyclic thiocarbamates bearing chiral
 quaternary stereocenters.
;
_journal_issue                   7
_journal_name_full               'Organic letters'
_journal_page_first              1544
_journal_page_last               1547
_journal_paper_doi               10.1021/ol1002829
_journal_volume                  12
_journal_year                    2010
_chemical_absolute_configuration rm
_chemical_formula_sum            'C17 H16 Br N2 O6 S'
_chemical_formula_weight         456.29
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           154
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'P 32 2"'
_symmetry_space_group_name_H-M   'P 32 2 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                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            6
_cell_length_a                   11.307(4)
_cell_length_b                   11.307(4)
_cell_length_c                   27.871(10)
_cell_measurement_reflns_used    1547
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      15.90
_cell_measurement_theta_min      2.20
_cell_volume                     3085.9(19)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \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  0.1606
_diffrn_reflns_av_sigmaI/netI    0.1547
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            15971
_diffrn_reflns_theta_full        25.49
_diffrn_reflns_theta_max         25.49
_diffrn_reflns_theta_min         2.08
_exptl_absorpt_coefficient_mu    2.133
_exptl_absorpt_correction_T_max  0.8479
_exptl_absorpt_correction_T_min  0.7403
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.473
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1386
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.336
_refine_diff_density_min         -0.362
_refine_diff_density_rms         0.065
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.019(19)
_refine_ls_extinction_coef       0.0028(8)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.905
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     248
_refine_ls_number_reflns         3844
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.905
_refine_ls_R_factor_all          0.1869
_refine_ls_R_factor_gt           0.0575
_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^)+(0.0810P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1187
_refine_ls_wR_factor_ref         0.1687
_reflns_number_gt                1592
_reflns_number_total             3844
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol1002829_si_002.cif
_cod_data_source_block           c2
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Trigonal' changed to 'trigonal'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P3(2)21 '
_cod_database_code               1502899