Studies on the Synthesis of the ABC Rings of (\±)-Hexacyclinic Acid
Paul A. Clarke; Andrew P. Cridland; Gabriele A. Rolla; Mudassar Iqbal; Nigel P. Bainbridge; Adrian C. Whitwood; Claire Wilson; Journal of Organic Chemistry 74 (2009) 7812–7821; doi:10.1021/jo901547k

data_4024914
_publ_section_title
;
Studies on the Synthesis of the ABC Rings of (\+-)-Hexacyclinic Acid
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              7812
_journal_page_last               7821
_journal_paper_doi               10.1021/jo901547k
_journal_volume                  74
_journal_year                    2009
_chemical_formula_sum            'C18 H21 Br O3'
_chemical_formula_weight         365.26
_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 & difmap (OH)'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                92.441(1)
_cell_angle_beta                 103.293(1)
_cell_angle_gamma                101.566(1)
_cell_formula_units_Z            2
_cell_length_a                   6.1238(5)
_cell_length_b                   11.6675(9)
_cell_length_c                   11.9189(9)
_cell_measurement_reflns_used    4285
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.4
_cell_volume                     808.43(11)
_computing_cell_refinement       'Bruker SAINT version 6.36a (Bruker, 2000)'
_computing_data_collection       'Bruker SMART version 5.625 (Bruker, 2001)'
_computing_data_reduction        'Bruker SAINT; Bruker SHELXTL (Bruker, 2001)'
_computing_publication_material  'enCIFer (CCDC, 2003); PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.960
_diffrn_measured_fraction_theta_max 0.954
_diffrn_measurement_device_type  'Bruker SMART APEX CCD area detector'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.014
_diffrn_reflns_av_sigmaI/netI    0.0227
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            6790
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.63
_diffrn_reflns_theta_min         2.39
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.552
_exptl_absorpt_correction_T_max  .700
_exptl_absorpt_correction_T_min  0.498
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'bruker SADABS v2.05'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.500
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       column
_exptl_crystal_F_000             376
_exptl_crystal_size_max          0.47
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.544
_refine_diff_density_min         -0.319
_refine_diff_density_rms         0.056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     200
_refine_ls_number_reflns         3575
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0258
_refine_ls_R_factor_gt           0.0236
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0310P)^2^+0.4189P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0603
_refine_ls_wR_factor_ref         0.0615
_reflns_number_gt                3359
_reflns_number_total             3575
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            jo901547k_si_002.cif
_cod_data_source_block           bzoxbr
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      ' P -1'
_cod_database_code               4024914