Construction of bispirooxindoles containing three quaternary stereocentres in a cascade using a single multifunctional organocatalyst.
Tan, Bin; Candeias, Nuno R.; Barbas, 3rd, Carlos F; Nature chemistry 3 (2011) 473–477; doi:10.1038/nchem.1039

data_1507939
_publ_section_title
;
 Construction of bispirooxindoles containing three quaternary
 stereocentres in a cascade using a single multifunctional organocatalyst.
;
_journal_issue                   6
_journal_name_full               'Nature chemistry'
_journal_page_first              473
_journal_page_last               477
_journal_paper_doi               10.1038/nchem.1039
_journal_volume                  3
_journal_year                    2011
_chemical_absolute_configuration ad
_chemical_formula_sum            'C45 H39 Cl N2 O7'
_chemical_formula_weight         755.23
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 93.883(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.7093(6)
_cell_length_b                   11.9854(8)
_cell_length_c                   15.6951(11)
_cell_measurement_reflns_used    1596
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      64.50
_cell_measurement_theta_min      4.65
_cell_volume                     1822.2(2)
_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      100(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.948
_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           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0536
_diffrn_reflns_av_sigmaI/netI    0.0759
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            5241
_diffrn_reflns_theta_full        65.00
_diffrn_reflns_theta_max         67.24
_diffrn_reflns_theta_min         2.82
_exptl_absorpt_coefficient_mu    1.403
_exptl_absorpt_correction_T_max  0.9205
_exptl_absorpt_correction_T_min  0.6037
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   TWINABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.376
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.306
_refine_diff_density_min         -0.380
_refine_diff_density_rms         0.068
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.02(3)
_refine_ls_extinction_coef       'not measured'
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     497
_refine_ls_number_reflns         5241
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0635
_refine_ls_R_factor_gt           0.0560
_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^)+(0.0861P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1318
_refine_ls_wR_factor_ref         0.1398
_reflns_number_gt                4605
_reflns_number_total             5241
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            nchem.1039-s2.cif
_cod_data_source_block           barbas09
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_absolute_configuration' value 'AD' changed to 'ad'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

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

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1507939