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_1501987
_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 unk
_chemical_formula_sum            'C23 H27 Cl N2 O4'
_chemical_formula_weight         430.92
_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                   5.8373(4)
_cell_length_b                   18.1668(13)
_cell_length_c                   21.7172(15)
_cell_measurement_reflns_used    934
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      23.529
_cell_measurement_theta_min      -23.529
_cell_volume                     2303.0(3)
_computing_cell_refinement       'BRUKER SMART'
_computing_data_collection       'BRUKER SMART'
_computing_data_reduction        'BRUKER SAINT'
_computing_molecular_graphics    Ortep-3
_computing_publication_material  'Wingx publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Bruker Smart Apex'
_diffrn_measurement_method       'phi-omega scan'
_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  0.0287
_diffrn_reflns_av_sigmaI/netI    0.0377
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            20313
_diffrn_reflns_theta_full        28.30
_diffrn_reflns_theta_max         28.30
_diffrn_reflns_theta_min         1.88
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.196
_exptl_absorpt_correction_T_max  0.9959
_exptl_absorpt_correction_T_min  0.9799
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.243
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             912
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.256
_refine_diff_density_min         -0.184
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.02(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     273
_refine_ls_number_reflns         5533
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0849
_refine_ls_R_factor_gt           0.0556
_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^)+(0.0773P)^2^+0.1388P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1318
_refine_ls_wR_factor_ref         0.1464
_reflns_number_gt                3805
_reflns_number_total             5533
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol200006e_si_002.cif
_cod_data_source_block           hcs269f2
_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.

'_exptl_absorpt_correction_type' value 'Empirical'
changed to 'empirical' 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_Hall     P2ac2ab
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1501987