Synthesis of highly functionalized chiral 3,3'-disubstituted oxindoles via an organocatalytic enantioselective Michael addition of nitroalkanes to indolylidenecyanoacetates.
Liu, Lu; Wu, Deyan; Zheng, Shu; Li, Tengfei; Li, Xiangmin; Wang, Sinan; Li, Jian; Li, Hao; Wang, Wei; Organic letters 14 (2012) 134–137; doi:10.1021/ol202931e

data_1503500
_publ_section_title
;
 Synthesis of highly functionalized chiral 3,3'-disubstituted oxindoles
 via an organocatalytic enantioselective Michael addition of nitroalkanes
 to indolylidenecyanoacetates.
;
_journal_issue                   1
_journal_name_full               'Organic letters'
_journal_page_first              134
_journal_page_last               137
_journal_paper_doi               10.1021/ol202931e
_journal_volume                  14
_journal_year                    2012
_chemical_absolute_configuration ad
_chemical_formula_sum            'C12 H10 Br N3 O3'
_chemical_formula_weight         324.14
_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                   7.2587(7)
_cell_length_b                   10.3598(10)
_cell_length_c                   16.6645(16)
_cell_measurement_reflns_used    2559
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      47.713
_cell_measurement_theta_min      4.630
_cell_volume                     1253.1(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0253
_diffrn_reflns_av_sigmaI/netI    0.0528
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            6764
_diffrn_reflns_theta_full        25.99
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         2.31
_exptl_absorpt_coefficient_mu    3.288
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.34245
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.718
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.305
_exptl_crystal_size_mid          0.269
_exptl_crystal_size_min          0.213
_refine_diff_density_max         1.114
_refine_diff_density_min         -0.290
_refine_diff_density_rms         0.118
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.021(15)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.068
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     180
_refine_ls_number_reflns         2448
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.0519
_refine_ls_R_factor_gt           0.0452
_refine_ls_shift/su_max          0.008
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0727P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1124
_refine_ls_wR_factor_ref         0.1168
_reflns_number_gt                2140
_reflns_number_total             2448
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol202931e_si_002.cif
_cod_data_source_block           compound4
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1503500