"Super Silyl" Group for Diastereoselective Sequential Reactions: Access to Complex Chiral Architecture in One Pot
Matthew B. Boxer; Hisashi Yamamoto; Journal of the American Chemical Society 129 (2007) 2762–2763; doi:10.1021/ja0693542

data_4109158
_publ_section_title
;
 "Super Silyl" Group for Diastereoselective Sequential Reactions: Access
 to Complex Chiral Architecture in One Pot
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2762
_journal_page_last               2763
_journal_paper_doi               10.1021/ja0693542
_journal_volume                  129
_journal_year                    2007
_chemical_formula_sum            'C42 H85 N2 O5 S Si8'
_chemical_formula_weight         954.90
_chemical_name_systematic
; 
 ? 
;
_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                87.146(5)
_cell_angle_beta                 67.582(5)
_cell_angle_gamma                63.125(5)
_cell_formula_units_Z            6
_cell_length_a                   21.620(6)
_cell_length_b                   21.642(6)
_cell_length_c                   25.730(7)
_cell_measurement_temperature    100(2)
_cell_volume                     9817(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.947
_diffrn_measured_fraction_theta_max 0.947
_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  0.0935
_diffrn_reflns_av_sigmaI/netI    0.2038
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            117015
_diffrn_reflns_theta_full        28.32
_diffrn_reflns_theta_max         28.32
_diffrn_reflns_theta_min         1.27
_exptl_absorpt_coefficient_mu    0.229
_exptl_absorpt_correction_T_max  0.9774
_exptl_absorpt_correction_T_min  0.9139
_exptl_crystal_density_diffrn    0.969
_exptl_crystal_F_000             3114
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         3.778
_refine_diff_density_min         -0.976
_refine_diff_density_rms         0.122
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.939
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           fullcycle
_refine_ls_number_parameters     1622
_refine_ls_number_reflns         46306
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.939
_refine_ls_R_factor_all          0.1816
_refine_ls_R_factor_gt           0.1069
_refine_ls_shift/su_max          5.024
_refine_ls_shift/su_mean         0.041
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1422P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2754
_refine_ls_wR_factor_ref         0.3077
_reflns_number_gt                19825
_reflns_number_total             46306
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0693542si20070105_052241.cif
_cod_data_source_block           boxer15z
_cod_original_cell_volume        9817(4)
_cod_database_code               4109158