Asymmetric glycolate aldol reactions using cinchonium phase-transfer catalysts.
Andrus, Merritt B.; Liu, Jing; Ye, Zhifeng; Cannon, John F.; Organic letters 7 (2005) 3861–3864; doi:10.1021/ol051096a

data_1506627
_publ_section_title
;
 Asymmetric glycolate aldol reactions using cinchonium phase-transfer
 catalysts.
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_journal_issue                   18
_journal_name_full               'Organic letters'
_journal_page_first              3861
_journal_page_last               3864
_journal_paper_doi               10.1021/ol051096a
_journal_volume                  7
_journal_year                    2005
_chemical_formula_sum            'C28 H26 O6'
_chemical_formula_weight         458.49
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 109.518(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.2933(4)
_cell_length_b                   12.9966(4)
_cell_length_c                   15.9109(6)
_cell_measurement_reflns_used    9174
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      68.89
_cell_measurement_theta_min      3.97
_cell_volume                     2396.02(14)
_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      296(2)
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'Bruker Nonius Apex II CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  'Montel 200 mirrors'
_diffrn_radiation_source         'Bruker Nonius FR591 rotating anode'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0238
_diffrn_reflns_av_sigmaI/netI    0.0228
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            15952
_diffrn_reflns_theta_full        67.49
_diffrn_reflns_theta_max         67.49
_diffrn_reflns_theta_min         3.81
_exptl_absorpt_coefficient_mu    0.728
_exptl_absorpt_correction_T_max  0.8802
_exptl_absorpt_correction_T_min  0.8113
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.271
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       PLATE
_exptl_crystal_F_000             968
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.197
_refine_diff_density_min         -0.262
_refine_diff_density_rms         0.082
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.063
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     310
_refine_ls_number_reflns         4260
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.063
_refine_ls_R_factor_all          0.0454
_refine_ls_R_factor_gt           0.0410
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0695P)^2^+0.4752P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1198
_refine_ls_wR_factor_ref         0.1225
_reflns_number_gt                3971
_reflns_number_total             4260
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol051096asi20050512_053955.cif
_cod_data_source_block           JL3R
_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 
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_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1506627