Tunable Cyclization Strategy for the Synthesis of Zizaene-, allo-Cedrane-, seco-Kaurane-, and seco-Atesane-Type Skeletons.
Yang, Qianqian; Ma, Wenjing; Wang, Gaopeng; Bao, Wenli; Dong, Xiaoshu; Liang, Xuefeng; Zhu, Lizhi; Lee, Chi-Sing; Organic letters 19 (2017) 5324–5327; doi:10.1021/acs.orglett.7b02610

data_1547303
_publ_section_title
;
 Tunable Cyclization Strategy for the Synthesis of Zizaene-,
 allo-Cedrane-, seco-Kaurane-, and seco-Atesane-Type Skeletons.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              5324
_journal_page_last               5327
_journal_paper_doi               10.1021/acs.orglett.7b02610
_journal_volume                  19
_journal_year                    2017
_chemical_formula_moiety         'C18 H28 O4 Si'
_chemical_formula_sum            'C18 H28 O4 Si'
_chemical_formula_weight         336.49
_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                 91.8138(18)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.8426(11)
_cell_length_b                   7.7701(4)
_cell_length_c                   12.1168(7)
_cell_measurement_reflns_used    9919
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.47
_cell_measurement_theta_min      2.82
_cell_volume                     1867.22(18)
_computing_cell_refinement       'Bruker APEX3'
_computing_data_collection       'Bruker APEX3'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Photon-100 CMOS area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'micro-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0401
_diffrn_reflns_av_sigmaI/netI    0.0232
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            44434
_diffrn_reflns_theta_full        27.55
_diffrn_reflns_theta_max         27.55
_diffrn_reflns_theta_min         2.82
_exptl_absorpt_coefficient_mu    0.142
_exptl_absorpt_correction_T_max  0.9943
_exptl_absorpt_correction_T_min  0.9612
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SAINT er 8.34a; BRUKER SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.197
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.298
_refine_diff_density_min         -0.297
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         4299
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0634
_refine_ls_R_factor_gt           0.0479
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0663P)^2^+0.7775P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1249
_refine_ls_wR_factor_ref         0.1354
_reflns_number_gt                3425
_reflns_number_total             4299
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol7b02610_si_005.cif
_cod_data_source_block           puslcs12
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 1547300--1547304.cif.
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1547303