Extending Pummerer reaction chemistry. Asymmetric synthesis of spirocyclic oxindoles via chiral indole-2-sulfoxides.
Feldman, Ken S.; Karatjas, Andrew G.; Organic letters 8 (2006) 4137–4140; doi:10.1021/ol0617244

data_1506186
_publ_section_title
;
 Extending Pummerer reaction chemistry. Asymmetric synthesis of
 spirocyclic oxindoles via chiral indole-2-sulfoxides.
;
_journal_issue                   18
_journal_name_full               'Organic letters'
_journal_page_first              4137
_journal_page_last               4140
_journal_paper_doi               10.1021/ol0617244
_journal_volume                  8
_journal_year                    2006
_chemical_formula_moiety         'C23 H25 N O5, 0.5(C6 H8)'
_chemical_formula_sum            'C26 H29 N O5'
_chemical_formula_weight         435.50
_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                   12.794(3)
_cell_length_b                   12.794(3)
_cell_length_c                   24.424(7)
_cell_measurement_reflns_used    5435
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      28.275
_cell_measurement_theta_min      2.481
_cell_volume                     3462.3(15)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_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      123(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  0.0310
_diffrn_reflns_av_sigmaI/netI    0.0230
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            23637
_diffrn_reflns_theta_full        28.32
_diffrn_reflns_theta_max         28.32
_diffrn_reflns_theta_min         1.84
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.984
_exptl_absorpt_correction_T_min  0.978
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.253
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1392
_exptl_crystal_size_max          0.41
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.19
_refine_diff_density_max         1.329
_refine_diff_density_min         -0.417
_refine_diff_density_rms         0.083
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     292
_refine_ls_number_reflns         5756
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0590
_refine_ls_R_factor_gt           0.0562
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1166P)^2^+0.6891P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1574
_refine_ls_wR_factor_ref         0.1626
_reflns_number_gt                5419
_reflns_number_total             5756
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol0617244si20060713_013750.cif
_cod_data_source_block           agk232
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        3462.2(13)
_cod_original_sg_symbol_H-M      P3(2)21
_cod_database_code               1506186