Organocatalytic enantioselective cascade Michael-Michael-Wittig reactions of phosphorus ylides: one-pot synthesis of the all-cis trisubstituted cyclohexenecarboxylates via the [1 + 2 + 3] annulation.
Hong, Bor-Cherng; Jan, Rei-Hau; Tsai, Chih-Wei; Nimje, Roshan Y.; Liao, Ju-Hsiou; Lee, Gene-Hsiang; Organic letters 11 (2009) 5246–5249; doi:10.1021/ol9021832

data_1504266
_publ_section_title
;
 Organocatalytic enantioselective cascade Michael-Michael-Wittig reactions
 of phosphorus ylides: one-pot synthesis of the all-cis trisubstituted
 cyclohexenecarboxylates via the [1 + 2 + 3] annulation.
;
_journal_issue                   22
_journal_name_full               'Organic letters'
_journal_page_first              5246
_journal_page_last               5249
_journal_paper_doi               10.1021/ol9021832
_journal_volume                  11
_journal_year                    2009
_chemical_absolute_configuration unk
_chemical_formula_sum            'C21 H21 N O4'
_chemical_formula_weight         351.39
_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                 112.9250(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.2127(10)
_cell_length_b                   6.0204(5)
_cell_length_c                   13.4972(11)
_cell_measurement_reflns_used    877
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      23.529
_cell_measurement_theta_min      -23.529
_cell_volume                     914.00(13)
_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      293(2)
_diffrn_measured_fraction_theta_full 0.961
_diffrn_measured_fraction_theta_max 0.961
_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  0.0244
_diffrn_reflns_av_sigmaI/netI    0.0475
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            8017
_diffrn_reflns_theta_full        28.30
_diffrn_reflns_theta_max         28.30
_diffrn_reflns_theta_min         1.64
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.9971
_exptl_absorpt_correction_T_min  0.9882
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.277
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       parallelepiped
_exptl_crystal_F_000             372
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.203
_refine_diff_density_min         -0.252
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.7(19)
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         4182
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.206
_refine_ls_R_factor_all          0.0958
_refine_ls_R_factor_gt           0.0779
_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^)+(0.0858P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1694
_refine_ls_wR_factor_ref         0.1850
_reflns_number_gt                3408
_reflns_number_total             4182
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol9021832_si_004.cif
_cod_data_source_block           jrh038df1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               1504266