Selective synthesis of multisubstituted olefins utilizing gem- and vic-diborylated vinylsilanes prepared by silylborylation of an alkynylboronate and diborylation of alkynylsilanes.
Jiao, Jiao; Hyodo, Keita; Hu, Hao; Nakajima, Kiyohiko; Nishihara, Yasushi; The Journal of organic chemistry 79 (2014) 285–295; doi:10.1021/jo4024057

data_4029054
_publ_section_title
;
 Selective synthesis of multisubstituted olefins utilizing gem- and
 vic-diborylated vinylsilanes prepared by silylborylation of an
 alkynylboronate and diborylation of alkynylsilanes.
;
_journal_issue                   1
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              285
_journal_page_last               295
_journal_paper_doi               10.1021/jo4024057
_journal_volume                  79
_journal_year                    2014
_chemical_formula_moiety         'C28 H40 B2 O4 Si'
_chemical_formula_sum            'C28 H40 B2 O4 Si'
_chemical_formula_weight         490.31
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_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                106.215(2)
_cell_angle_beta                 91.906(2)
_cell_angle_gamma                104.067(2)
_cell_formula_units_Z            2
_cell_length_a                   9.6731(11)
_cell_length_b                   12.2468(14)
_cell_length_c                   13.2905(14)
_cell_measurement_reflns_used    11400
_cell_measurement_temperature    298
_cell_measurement_theta_max      27.74
_cell_measurement_theta_min      3.08
_cell_volume                     1457.8(3)
_computing_cell_refinement       PROCESS-AUTO
_computing_data_collection       PROCESS-AUTO
_computing_data_reduction        PROCESS-AUTO
_computing_molecular_graphics    'CrystalStructure 4.0 (Rigaku, 2010)'
_computing_publication_material  'CrystalStructure 4.0 (Rigaku, 2010)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      298
_diffrn_detector_area_resol_mean 6.849
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Rigaku SCX mini'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.1059
_diffrn_reflns_av_sigmaI/netI    0.1477
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            15390
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.08
_exptl_absorpt_coefficient_mu    0.110
_exptl_absorpt_correction_T_max  0.9891
_exptl_absorpt_correction_T_min  0.9731
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'NUMABS (Rigaku, 1999)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.117
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             528
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.272
_refine_diff_density_min         -0.209
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.060
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     316
_refine_ls_number_reflns         6643
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.060
_refine_ls_R_factor_all          0.2351
_refine_ls_R_factor_gt           0.1058
_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^+0.9574P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1969
_refine_ls_wR_factor_ref         0.2558
_reflns_number_gt                2830
_reflns_number_total             6643
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo4024057_si_002.cif
_cod_data_source_block           shelxl
_cod_database_code               4029054