Bioinspired Synthesis of Pentacyclic Onocerane Triterpenoids
Bartels, Florian; Hong, Young J.; Ueda, Daijiro; Weber, Manuela; Sato, Tsutomu; Tantillo, Dean J.; Christmann, Mathias; Chem. Sci.  (2017) –; doi:10.1039/C7SC03903D

data_1547686
_publ_section_title
;
 Bioinspired Synthesis of Pentacyclic Onocerane Triterpenoids
;
_journal_name_full               'Chem. Sci.'
_journal_paper_doi               10.1039/C7SC03903D
_journal_year                    2017
_chemical_absolute_configuration ad
_chemical_formula_sum            'C37 H55 Br O3'
_chemical_formula_weight         627.72
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-01-22 deposited with the CCDC.
2017-10-16 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 107.5520(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   16.9259(7)
_cell_length_b                   8.7979(3)
_cell_length_c                   23.0465(9)
_cell_measurement_reflns_used    8520
_cell_measurement_temperature    101(2)
_cell_measurement_theta_max      24.16
_cell_measurement_theta_min      2.41
_cell_volume                     3272.1(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX3'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Diamond 2.1e'
_computing_publication_material  'Microsoft Word'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      101(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker Photon CMOS Detector, D8 Venture'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1495
_diffrn_reflns_av_unetI/netI     0.1246
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            54890
_diffrn_reflns_point_group_measured_fraction_full 0.995
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.045
_diffrn_reflns_theta_max         25.045
_diffrn_reflns_theta_min         2.412
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    1.292
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.274
_exptl_crystal_description       needle
_exptl_crystal_F_000             1344
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: C6H6, (CH2Cl)2, iPrOH'
_exptl_crystal_size_max          0.420
_exptl_crystal_size_mid          0.050
_exptl_crystal_size_min          0.020
_exptl_transmission_factor_max   0.7844
_exptl_transmission_factor_min   0.6763
_refine_diff_density_max         0.327
_refine_diff_density_min         -0.376
_refine_diff_density_rms         0.072
_refine_ls_abs_structure_details
;
 Flack x determined using 2691 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.023(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.008
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     743
_refine_ls_number_reflns         11547
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.008
_refine_ls_R_factor_all          0.1000
_refine_ls_R_factor_gt           0.0534
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0142P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0733
_refine_ls_wR_factor_ref         0.0835
_reflns_Friedel_coverage         0.861
_reflns_Friedel_fraction_full    0.992
_reflns_Friedel_fraction_max     0.992
_reflns_number_gt                8254
_reflns_number_total             11547
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7sc03903d2.cif
_cod_data_source_block           FB5801Ba
_cod_database_code               1547686
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.613
_shelx_estimated_absorpt_t_max   0.975
_shelx_res_checksum              10502