Diastereoselective Synthesis of Seven-Membered-Ring trans-Alkenes from Dienes and Aldehydes by Silylene Transfer
Margaret A. Greene; Michel Prévost; Joshua Tolopilo; K. A. Woerpel; Journal of the American Chemical Society 134 (2012) 12482–12484; doi:10.1021/ja305713v

data_4118443
_publ_section_title
;
 Diastereoselective Synthesis of Seven-Membered-Ring trans-Alkenes from
 Dienes and Aldehydes by Silylene Transfer
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12482
_journal_page_last               12484
_journal_paper_doi               10.1021/ja305713v
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C21 H36 O2 Si'
_chemical_formula_weight         348.59
_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   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXTL
_cell_angle_alpha                92.8478(10)
_cell_angle_beta                 104.6752(10)
_cell_angle_gamma                94.8505(10)
_cell_formula_units_Z            4
_cell_length_a                   10.1036(8)
_cell_length_b                   13.2601(11)
_cell_length_c                   16.4985(13)
_cell_measurement_reflns_used    9861
_cell_measurement_temperature    148(2)
_cell_measurement_theta_max      0.00
_cell_measurement_theta_min      0.00
_cell_volume                     2124.8(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      148(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker SMART APEX II CCD'
_diffrn_measurement_method       'phi and omega'
_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  0.0204
_diffrn_reflns_av_sigmaI/netI    0.0227
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            23024
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         1.28
_exptl_absorpt_coefficient_mu    0.120
_exptl_absorpt_correction_T_max  0.9822
_exptl_absorpt_correction_T_min  0.9568
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.090
_exptl_crystal_density_meas      ?
_exptl_crystal_description       block
_exptl_crystal_F_000             768
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.576
_refine_diff_density_min         -0.198
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     721
_refine_ls_number_reflns         8674
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0505
_refine_ls_R_factor_gt           0.0445
_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^)+(0.0702P)^2^+0.9609P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1193
_refine_ls_wR_factor_ref         0.1240
_reflns_number_gt                7586
_reflns_number_total             8674
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja305713v_si_005.cif
_cod_data_source_block           kaw143
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' 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_database_code               4118443