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_1547300
_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 O3 Si'
_chemical_formula_sum            'C18 H28 O3 Si'
_chemical_formula_weight         320.49
_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                 100.001(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.273(7)
_cell_length_b                   7.630(3)
_cell_length_c                   12.384(5)
_cell_measurement_reflns_used    8902
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.58
_cell_measurement_theta_min      2.88
_cell_volume                     1793.4(12)
_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      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0645
_diffrn_reflns_av_sigmaI/netI    0.0458
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            20166
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         2.88
_exptl_absorpt_coefficient_mu    0.141
_exptl_absorpt_correction_T_max  0.9860
_exptl_absorpt_correction_T_min  0.9697
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SAINT ver 8.34a; BRUKER SADABS'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.187
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.568
_refine_diff_density_min         -0.470
_refine_diff_density_rms         0.081
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.074
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     210
_refine_ls_number_reflns         3664
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.074
_refine_ls_R_factor_all          0.1088
_refine_ls_R_factor_gt           0.0875
_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^)+(0.1012P)^2^+2.9743P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2212
_refine_ls_wR_factor_ref         0.2375
_reflns_number_gt                2836
_reflns_number_total             3664
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol7b02610_si_004.cif
_cod_data_source_block           PUSLCS13
_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               1547300