SmI2-promoted intramolecular asymmetric pinacol-type ketone-tert-butanesulfinyl imine reductive coupling: stereoselectivity and mechanism.
Wang, Bing; Wang, Yong-Jun; Organic letters 11 (2009) 3410–3413; doi:10.1021/ol901296u

data_1504046
_publ_section_title
;
 SmI2-promoted intramolecular asymmetric pinacol-type
 ketone-tert-butanesulfinyl imine reductive coupling: stereoselectivity
 and mechanism.
;
_journal_issue                   15
_journal_name_full               'Organic letters'
_journal_page_first              3410
_journal_page_last               3413
_journal_paper_doi               10.1021/ol901296u
_journal_volume                  11
_journal_year                    2009
_chemical_formula_sum            'C16 H25 N O2 S'
_chemical_formula_weight         295.43
_space_group_IT_number           7
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P -2yc'
_symmetry_space_group_name_H-M   'P 1 c 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                 91.940(13)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.119(4)
_cell_length_b                   13.231(10)
_cell_length_c                   20.150(15)
_cell_measurement_reflns_used    689
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      21.003
_cell_measurement_theta_min      3.079
_cell_volume                     1630(2)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 2000)'
_computing_data_reduction        'SAINT (Bruker, 2000)'
_computing_molecular_graphics    'SHELXTL (Bruker, 2000)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker SMART APEX CCD area detector'
_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  0.0625
_diffrn_reflns_av_sigmaI/netI    0.1028
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            7997
_diffrn_reflns_theta_full        27.12
_diffrn_reflns_theta_max         27.12
_diffrn_reflns_theta_min         1.54
_exptl_absorpt_coefficient_mu    0.200
_exptl_absorpt_correction_T_max  0.9764
_exptl_absorpt_correction_T_min  0.9610
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.204
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.744
_refine_diff_density_min         -0.239
_refine_diff_density_rms         0.067
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.04(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     377
_refine_ls_number_reflns         4716
_refine_ls_number_restraints     5
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.1113
_refine_ls_R_factor_gt           0.0779
_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^)+(0.1193P)^2^+0.0634P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1950
_refine_ls_wR_factor_ref         0.2193
_reflns_number_gt                3177
_reflns_number_total             4716
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            ol901296u_si_002.cif
_cod_data_source_block           3a
_cod_depositor_comments
;
The following automatic conversions were performed:
'_atom_site_symetry_multiplicity' tag replaced with
'_atom_site_symmetry_multiplicity'.

Automatic conversion script
Id: cif_correct_tags 1440 2010-10-19 06:21:57Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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      'P c'
_cod_database_code               1504046