Synthetic Study on Naphthospironone A: Construction of Benzobicyclo[3.2.1]octene Skeleton with Oxaspirocycle.
Sakata, Juri; Ando, Yoshio; Ohmori, Ken; Suzuki, Keisuke; Organic letters 17 (2015) 3746–3749; doi:10.1021/acs.orglett.5b01732

data_1529849
_publ_section_title
;
 Synthetic Study on Naphthospironone A: Construction of
 Benzobicyclo[3.2.1]octene Skeleton with Oxaspirocycle.
;
_journal_issue                   15
_journal_name_full               'Organic letters'
_journal_page_first              3746
_journal_page_last               3749
_journal_paper_doi               10.1021/acs.orglett.5b01732
_journal_volume                  17
_journal_year                    2015
_chemical_formula_moiety         'C31 H40 O6 Si, C3 H7, C3 H7'
_chemical_formula_sum            'C37 H54 O6 Si'
_chemical_formula_weight         622.89
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 92.873(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   9.8958(4)
_cell_length_b                   32.0974(12)
_cell_length_c                   20.6189(9)
_cell_measurement_reflns_used    61853
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.49
_cell_measurement_theta_min      3.00
_cell_volume                     6540.9(5)
_computing_cell_refinement       'PROCESS-AUTO (Rigaku, 1998)'
_computing_data_collection       'PROCESS-AUTO (Rigaku, 1998)'
_computing_data_reduction        'PROCESS-AUTO (Rigaku, 1998)'
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 2008)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR-2004 (Burla, 2005)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID IP Area Detector System'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode X-ray tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0924
_diffrn_reflns_av_sigmaI/netI    0.0835
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       41
_diffrn_reflns_limit_k_min       -41
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            61853
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         3.00
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.118
_exptl_absorpt_correction_T_max  0.9883
_exptl_absorpt_correction_T_min  0.9768
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Absorption was corrected by ABSCOR'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.265
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2704
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.527
_refine_diff_density_min         -0.302
_refine_diff_density_rms         0.088
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     747
_refine_ls_number_reflns         14961
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0934
_refine_ls_R_factor_gt           0.0642
_refine_ls_shift/su_max          0.010
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0822P)^2^+0.3775P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1518
_refine_ls_wR_factor_ref         0.1698
_reflns_number_gt                10265
_reflns_number_total             14961
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol5b01732_si_003.cif
_cod_data_source_block           shelxl
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1529849