Synthesis of (\±)-epi-Stegobinone Utilizing Silacyclopropanes as Synthetic Intermediates
Stacie A. Calad; Jelena Ćirakovč; K. A. Woerpel; Journal of Organic Chemistry 72 (2007) 1027–1030; doi:10.1021/jo0620011

data_4022650
_publ_section_title
;
 Synthesis of (\+-)-epi-Stegobinone Utilizing Silacyclopropanes
 as Synthetic Intermediates
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              1027
_journal_page_last               1030
_journal_paper_doi               10.1021/jo0620011
_journal_volume                  72
_journal_year                    2007
_chemical_formula_sum            'C13 H24 O3'
_chemical_formula_weight         228.32
_space_group_IT_number           148
_symmetry_cell_setting           rhombohedral
_symmetry_space_group_name_Hall  '-R 3'
_symmetry_space_group_name_H-M   'R -3 :H'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXTL
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            18
_cell_length_a                   16.6121(8)
_cell_length_b                   16.6121(8)
_cell_length_c                   25.705(2)
_cell_measurement_temperature    163(2)
_cell_volume                     6143.3(7)
_computing_cell_refinement       'Bruker SMART/SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      163(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0249
_diffrn_reflns_av_sigmaI/netI    0.0126
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            26471
_diffrn_reflns_theta_full        28.30
_diffrn_reflns_theta_max         28.30
_diffrn_reflns_theta_min         1.62
_diffrn_standards_decay_%        '< 1.0'
_diffrn_standards_interval_count 'initial 50 frames recollected'
_diffrn_standards_number         '50 frames'
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  0.9736
_exptl_absorpt_correction_T_min  0.9663
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.111
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       polyhedra
_exptl_crystal_F_000             2268
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.39
_exptl_crystal_size_min          0.35
_refine_diff_density_max         0.384
_refine_diff_density_min         -0.170
_refine_diff_density_rms         0.038
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     241
_refine_ls_number_reflns         3386
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0423
_refine_ls_R_factor_gt           0.0359
_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^)+(0.0569P)^2^+4.4726P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0963
_refine_ls_wR_factor_ref         0.1043
_reflns_number_gt                2961
_reflns_number_total             3386
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo0620011si20060928_122030.cif
_cod_data_source_block           kaw79
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Rhombohedral' changed to 'rhombohedral'
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 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'n/a' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'R -3'
_cod_database_code               4022650