Total Syntheses of (-)-Majucin and (-)-Jiadifenoxolane A, Complex Majucin-Type Illicium Sesquiterpenes.
Condakes, Matthew L.; Hung, Kevin; Harwood, Stephen; Maimone, Thomas J.; Journal of the American Chemical Society  (2017) –; doi:10.1021/jacs.7b11493

data_4126767
_publ_section_title
;
 Total Syntheses of (-)-Majucin and (-)-Jiadifenoxolane A, Complex
 Majucin-Type Illicium Sesquiterpenes.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_paper_doi               10.1021/jacs.7b11493
_journal_year                    2017
_chemical_absolute_configuration ad
_chemical_formula_sum            'C15 H20 O8'
_chemical_formula_weight         328.31
_chemical_name_common            KH_LIT2_majucin
_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'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.9941(3)
_cell_length_b                   12.1369(6)
_cell_length_c                   16.1722(8)
_cell_measurement_reflns_used    9967
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.35
_cell_measurement_theta_min      2.52
_cell_volume                     1372.80(11)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    Mercury
_computing_publication_material  WinGX
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXT (Sheldrick 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.366
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0367
_diffrn_reflns_av_unetI/netI     0.0214
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            24403
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        28.000
_diffrn_reflns_theta_max         28.352
_diffrn_reflns_theta_min         2.098
_diffrn_source                   'microfocus sealed tube'
_exptl_absorpt_coefficient_mu    0.130
_exptl_absorpt_correction_T_max  0.746
_exptl_absorpt_correction_T_min  0.705
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.588
_exptl_crystal_description       Block
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.260
_exptl_crystal_size_mid          0.170
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.307
_refine_diff_density_min         -0.221
_refine_diff_density_rms         0.045
_refine_ls_abs_structure_details
;
 Flack x determined using 1386 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.1(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     226
_refine_ls_number_reflns         3431
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.0310
_refine_ls_R_factor_gt           0.0300
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0381P)^2^+0.4848P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0755
_refine_ls_wR_factor_ref         0.0761
_reflns_Friedel_coverage         0.733
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                3329
_reflns_number_total             3431
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja7b11493_si_001.cif
_cod_data_source_block           KH_LIT2_majucin
_cod_database_code               4126767
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.967
_shelx_estimated_absorpt_t_max   0.987
_shelx_res_checksum              60507
_shelx_hkl_checksum              52651