Synthesis of the Tetracyclic Core of Exiguaquinol
Schwarzwalder, Gregg M.; Steinhardt, Sarah E.; Pham, Hung V.; Houk, K. N.; Vanderwal, Christopher D.; Organic Letters 15 (2013) 6014–; doi:10.1021/ol402905n

data_1513139
_publ_section_title
;
 Synthesis of the Tetracyclic Core of Exiguaquinol
;
_journal_issue                   23
_journal_name_full               'Organic Letters'
_journal_page_first              6014
_journal_paper_doi               10.1021/ol402905n
_journal_volume                  15
_journal_year                    2013
_chemical_formula_sum            'C24 H34 I N O3 Si'
_chemical_formula_weight         539.51
_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           SHELXTL
_cell_angle_alpha                90.00
_cell_angle_beta                 92.4761(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.4043(4)
_cell_length_b                   11.4302(4)
_cell_length_c                   17.7674(6)
_cell_measurement_reflns_used    9820
_cell_measurement_temperature    88(2)
_cell_measurement_theta_max      28.82
_cell_measurement_theta_min      2.42
_cell_volume                     2516.77(15)
_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    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      88(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.944
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \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  0.0158
_diffrn_reflns_av_sigmaI/netI    0.0205
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            30446
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         28.92
_diffrn_reflns_theta_min         1.64
_exptl_absorpt_coefficient_mu    1.344
_exptl_absorpt_correction_T_max  0.8641
_exptl_absorpt_correction_T_min  0.7172
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.424
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1104
_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.11
_refine_diff_density_max         1.055
_refine_diff_density_min         -0.346
_refine_diff_density_rms         0.062
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.226(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     550
_refine_ls_number_reflns         12174
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0231
_refine_ls_R_factor_gt           0.0219
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0303P)^2^+0.8775P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0545
_refine_ls_wR_factor_ref         0.0551
_reflns_number_gt                11770
_reflns_number_total             12174
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol402905n_si_002.cif
_cod_data_source_block           cdv19
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not_measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1513139