Chemoselective cyclizations of divinyl ketones to cyclohexenones mediated by Lewis acid and base.
Magomedov, Nabi A.; Ruggiero, Piero L.; Tang, Yuchen; Organic letters 6 (2004) 3373–3375; doi:10.1021/ol048545b

data_1507010
_publ_section_title
;
 Chemoselective cyclizations of divinyl ketones to cyclohexenones mediated
 by Lewis acid and base.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              3373
_journal_page_last               3375
_journal_paper_doi               10.1021/ol048545b
_journal_volume                  6
_journal_year                    2004
_chemical_formula_moiety         'C21 H20 O3 S'
_chemical_formula_sum            'C21 H20 O3 S'
_chemical_formula_weight         352.43
_chemical_name_common            MAGYT05
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                75.9560(10)
_cell_angle_beta                 88.2140(10)
_cell_angle_gamma                83.3020(10)
_cell_formula_units_Z            2
_cell_length_a                   8.3304(2)
_cell_length_b                   9.7389(3)
_cell_length_c                   11.3810(3)
_cell_measurement_reflns_used    8246
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.402
_cell_measurement_theta_min      2.462
_cell_volume                     889.61(4)
_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      100(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       '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  0.0150
_diffrn_reflns_av_sigmaI/netI    0.0149
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            12434
_diffrn_reflns_theta_full        28.40
_diffrn_reflns_theta_max         28.40
_diffrn_reflns_theta_min         1.84
_exptl_absorpt_coefficient_mu    0.199
_exptl_absorpt_correction_T_max  0.957
_exptl_absorpt_correction_T_min  0.931
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.316
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             372
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.22
_refine_diff_density_max         1.470
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_refine_diff_density_rms         0.074
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     228
_refine_ls_number_reflns         4451
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0580
_refine_ls_R_factor_gt           0.0554
_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^)+(0.0711P)^2^+1.0820P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1447
_refine_ls_wR_factor_ref         0.1468
_reflns_number_gt                4143
_reflns_number_total             4451
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol048545bsi20040803_115107.cif
_cod_data_source_block           sdf
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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_H-M      P-1
_cod_database_code               1507010