Asymmetric Total Synthesis of Cerorubenic Acid-III.
Liu, Xin; Liu, Junyang; Wu, Jianlei; Huang, Guocheng; Liang, Rong; Chung, Lung Wa; Li, Chuang-Chuang; Journal of the American Chemical Society 141 (2019) 2872–2877; doi:10.1021/jacs.8b12647

data_4128437
_publ_section_title
;
 Asymmetric Total Synthesis of Cerorubenic Acid-III.
;
_journal_issue                   7
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2872
_journal_page_last               2877
_journal_paper_doi               10.1021/jacs.8b12647
_journal_volume                  141
_journal_year                    2019
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C27 H42 O2'
_chemical_formula_sum            'C27 H42 O2'
_chemical_formula_weight         398.60
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-08-02
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.8763(17)
_cell_length_b                   15.381(3)
_cell_length_c                   15.448(3)
_cell_measurement_reflns_used    9967
_cell_measurement_temperature    115
_cell_measurement_theta_max      26.27
_cell_measurement_theta_min      2.45
_cell_volume                     2346.7(8)
_computing_cell_refinement       'SAINT V8.38A (?, 2016)'
_computing_data_reduction        'SAINT V8.38A (?, 2016)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      115.0
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0658
_diffrn_reflns_av_unetI/netI     0.0448
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            27498
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.454
_diffrn_reflns_theta_min         2.448
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.068
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.5695
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1491 before and 0.0803 after correction. The Ratio of minimum to maximum transmission is 0.7640. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.128
_exptl_crystal_description       needle
_exptl_crystal_F_000             880
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.197
_refine_diff_density_min         -0.151
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details
;
 Flack x determined using 1759 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.3(7)
_refine_ls_extinction_coef       0.0071(15)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2016/6 (Sheldrick 2016)'
_refine_ls_goodness_of_fit_ref   1.087
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     269
_refine_ls_number_reflns         4814
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.087
_refine_ls_R_factor_all          0.0431
_refine_ls_R_factor_gt           0.0390
_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^)+(0.0311P)^2^+0.4908P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0878
_refine_ls_wR_factor_ref         0.0897
_reflns_Friedel_coverage         0.764
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.997
_reflns_number_gt                4473
_reflns_number_total             4814
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja8b12647_si_003.cif
_cod_data_source_block           liuxin20180802_0m
_cod_original_cell_volume        2346.6(7)
_cod_database_code               4128437
_shelx_shelxl_version_number     2016/6
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C3(H3), C4(H4), C5(H5), C6(H6), C7(H7), C16(H16), C19(H19), C26(H26)
2.b Secondary CH2 refined with riding coordinates:
 C8(H8A,H8B), C9(H9A,H9B), C14(H14A,H14B), C15(H15A,H15B), C22(H22A,H22B),
 C23(H23A,H23B), C27(H27A,H27B)
2.c Aromatic/amide H refined with riding coordinates:
 C10(H10), C24(H24)
2.d Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C12(H12A,H12B,H12C), C13(H13A,H13B,H13C), C17(H17A,H17B,
 H17C), C18(H18A,H18B,H18C), C21(H21A,H21B,H21C)
;
_shelx_res_checksum              22620
_shelx_hkl_checksum              12421
_olex2_submission_special_instructions 'No special instructions were received'