Dynamic kinetic asymmetric synthesis of five contiguous stereogenic centers by sequential organocatalytic stetter and Michael-aldol reaction: enantioselective synthesis of fully substituted cyclopentanols bearing a quaternary stereocenter.
Hong, Bor-Cherng; Dange, Nitin S.; Hsu, Che-Sheng; Liao, Ju-Hsiou; Lee, Gene-Hsiang; Organic letters 13 (2011) 1338–1341; doi:10.1021/ol200006e

data_1501990
_publ_section_title
;
 Dynamic kinetic asymmetric synthesis of five contiguous stereogenic
 centers by sequential organocatalytic stetter and Michael-aldol reaction:
 enantioselective synthesis of fully substituted cyclopentanols bearing a
 quaternary stereocenter.
;
_journal_issue                   6
_journal_name_full               'Organic letters'
_journal_page_first              1338
_journal_page_last               1341
_journal_paper_doi               10.1021/ol200006e
_journal_volume                  13
_journal_year                    2011
_chemical_absolute_configuration ad
_chemical_formula_sum            'C10 H10.5 Br0.5 N O2'
_chemical_formula_weight         216.65
_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                 112.947(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.6085(17)
_cell_length_b                   5.7821(8)
_cell_length_c                   15.108(2)
_cell_measurement_reflns_used    1628
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      20.66
_cell_measurement_theta_min      2.69
_cell_volume                     1014.3(2)
_computing_cell_refinement       'Bruker SAINT'
_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      200(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'BRUKER SMART APEXCCD area detector'
_diffrn_measurement_method       '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  0.0462
_diffrn_reflns_av_sigmaI/netI    0.0896
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            9996
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.46
_exptl_absorpt_coefficient_mu    2.053
_exptl_absorpt_correction_T_max  0.8867
_exptl_absorpt_correction_T_min  0.3722
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.419
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             444
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.693
_refine_diff_density_min         -0.501
_refine_diff_density_rms         0.092
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.02(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     234
_refine_ls_number_reflns         4600
_refine_ls_number_restraints     9
_refine_ls_restrained_S_all      1.093
_refine_ls_R_factor_all          0.1166
_refine_ls_R_factor_gt           0.0713
_refine_ls_shift/su_max          0.008
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0882P)^2^+0.2116P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1695
_refine_ls_wR_factor_ref         0.2014
_reflns_number_gt                2844
_reflns_number_total             4600
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol200006e_si_005.cif
_cod_data_source_block           ic14704
_cod_depositor_comments
;
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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

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_original_formula_sum        'C10 H10.50 Br0.50 N O2'
_cod_database_code               1501990