cis-Enals in N-heterocyclic carbene-catalyzed reactions: distinct stereoselectivity and reactivity
Chen, Xingkuan; Fang, Xinqiang; Chi, Yonggui Robin; Chemical Science 4 (2013) 2613–; doi:10.1039/c3sc50666e

data_1514661
_publ_section_title
;
 cis-Enals in N-heterocyclic carbene-catalyzed reactions: distinct
 stereoselectivity and reactivity
;
_journal_issue                   6
_journal_name_full               'Chemical Science'
_journal_page_first              2613
_journal_paper_doi               10.1039/c3sc50666e
_journal_volume                  4
_journal_year                    2013
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C31 H24 Br3 N O3 S, C3 H6 O'
_chemical_formula_sum            'C34 H30 Br3 N O4 S'
_chemical_formula_weight         788.38
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_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
_atom_sites_solution_secondary   difmap
_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                   11.8916(3)
_cell_length_b                   15.4391(4)
_cell_length_c                   17.7101(5)
_cell_measurement_reflns_used    3635
_cell_measurement_temperature    103(2)
_cell_measurement_theta_max      24.86
_cell_measurement_theta_min      2.45
_cell_volume                     3251.50(15)
_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      103(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0551
_diffrn_reflns_av_sigmaI/netI    0.1039
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            23280
_diffrn_reflns_theta_full        29.35
_diffrn_reflns_theta_max         29.35
_diffrn_reflns_theta_min         1.75
_exptl_absorpt_coefficient_mu    3.825
_exptl_absorpt_correction_T_max  0.7495
_exptl_absorpt_correction_T_min  0.5151
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.611
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1576
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.332
_refine_diff_density_min         -0.545
_refine_diff_density_rms         0.122
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.003(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     714
_refine_ls_number_reflns         8889
_refine_ls_number_restraints     1722
_refine_ls_restrained_S_all      0.976
_refine_ls_R_factor_all          0.0997
_refine_ls_R_factor_gt           0.0493
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0563P)^2^+1.3482P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1030
_refine_ls_wR_factor_ref         0.1378
_reflns_number_gt                5807
_reflns_number_total             8889
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3sc50666e.txt
_cod_data_source_block           cyg34s
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1514661