Total Synthesis of (+)-Chinensiolide B via Tandem Allylboration/Lactonization
Tim G. Elford; Dennis G. Hall; Journal of the American Chemical Society 132 (2010) 1488–1489; doi:10.1021/ja9104478

data_4101875
_publ_contact_author_address
; Department of Chemistry
  University of Alberta
  Edmonton, Alberta T6G 2G2
  Canada
;
_publ_contact_author_email       dennis.hall@ualberta.ca
_publ_contact_author_fax         1(780)4928231
_publ_contact_author_name        'Dr. Dennis Hall'
_publ_contact_author_phone       1(780)4923141
_publ_section_title
;
 Total Synthesis of (+)-Chinensiolide B via Tandem
 Allylboration/Lactonization
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              1488
_journal_page_last               1489
_journal_paper_doi               10.1021/ja9104478
_journal_volume                  132
_journal_year                    2010
_chemical_absolute_configuration syn
_chemical_formula_sum            'C24 H39 N O3 Si'
_chemical_formula_weight         417.65
_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                 107.7359(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.9585(4)
_cell_length_b                   7.9293(3)
_cell_length_c                   15.5064(6)
_cell_measurement_reflns_used    9952
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.45
_cell_measurement_theta_min      2.71
_cell_volume                     1283.36(8)
_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    'SHELXD (Schneider & Sheldrick, 2002)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\w 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  0.0160
_diffrn_reflns_av_sigmaI/netI    0.0230
_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       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            11315
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.95
_exptl_absorpt_coefficient_mu    0.113
_exptl_absorpt_correction_T_max  0.9867
_exptl_absorpt_correction_T_min  0.9482
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.081
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             456
_exptl_crystal_size_max          0.47
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.388
_refine_diff_density_min         -0.159
_refine_diff_density_rms         0.035
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.04(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     263
_refine_ls_number_reflns         5820
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0338
_refine_ls_R_factor_gt           0.0319
_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^)+(0.0570P)^2^+0.0794P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0848
_refine_ls_wR_factor_ref         0.0868
_reflns_number_gt                5554
_reflns_number_total             5820
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja9104478_si_002.cif
_cod_data_source_block           9
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4101875