Approach to the Homoerythrina Alkaloids Using a Tandem N-Alkylation/Azomethine Ylide Cycloaddition
William H. Pearson; Jeffrey E. Kropf; Allison L. Choy; Ill Young Lee; Jeff W. Kampf; Journal of Organic Chemistry 72 (2007) 4135–4148; doi:10.1021/jo0703799

data_4022939
_publ_section_title
;
 Approach to the Homoerythrina Alkaloids Using a Tandem
 N-Alkylation/Azomethine Ylide Cycloaddition
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              4135
_journal_page_last               4148
_journal_paper_doi               10.1021/jo0703799
_journal_volume                  72
_journal_year                    2007
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C24 H27 N O5 S2'
_chemical_formula_sum            'C24 H27 N O5 S2'
_chemical_formula_weight         473.59
_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                 93.074(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   11.1809(14)
_cell_length_b                   8.2450(10)
_cell_length_c                   12.1335(15)
_cell_measurement_reflns_used    5689
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.33
_cell_measurement_theta_min      2.99
_cell_volume                     1116.9(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0258
_diffrn_reflns_av_sigmaI/netI    0.0324
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            12083
_diffrn_reflns_theta_full        28.33
_diffrn_reflns_theta_max         28.33
_diffrn_reflns_theta_min         2.99
_exptl_absorpt_coefficient_mu    0.276
_exptl_absorpt_correction_T_max  0.9677
_exptl_absorpt_correction_T_min  0.8978
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
  Blessing, R. Acta Cryst. (1995) A51 33-38.
  Sheldrick, G.  SADABS (Version 2.10) Bruker/Siemens area
  detector absorption and other corrections, University of
  Gottingen, Germany 2003. 
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.408
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             500
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.617
_refine_diff_density_min         -0.321
_refine_diff_density_rms         0.052
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     291
_refine_ls_number_reflns         5371
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0426
_refine_ls_R_factor_gt           0.0362
_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^)+(0.0490P)^2^+0.3593P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0884
_refine_ls_wR_factor_ref         0.0918
_reflns_number_gt                4881
_reflns_number_total             5371
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo0703799si20070224_022836.cif
_cod_data_source_block           jk473
_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_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4022939