Enantioselective Construction of the Tricyclic Core of Curcusones A–D via a Cross-electrophile Coupling Approach
Wright, Austin C.; Stoltz, Brian M.; Chemical Science  (2019) –; doi:10.1039/C9SC04127C

data_1552366
_publ_section_title
;
 Enantioselective Construction of the Tricyclic Core of Curcusones A--D
 via a Cross-electrophile Coupling Approach
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/C9SC04127C
_journal_year                    2019
_chemical_absolute_configuration ad
_chemical_formula_sum            'C18 H22 O'
_chemical_formula_weight         254.35
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2018/3
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.7708(6)
_cell_length_b                   10.8979(10)
_cell_length_c                   19.414(2)
_cell_measurement_reflns_used    9317
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      74.41
_cell_measurement_theta_min      4.06
_cell_volume                     1432.5(2)
_computing_cell_refinement       'SAINT v8.38A (Bruker-AXS, 2013)'
_computing_data_collection       'APEX3 v2017.3-0 (Bruker-AXS, 2017)'
_computing_data_reduction        'SAINT v8.38A (Bruker-AXS, 2013)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXS-2013/1 (Sheldrick, 2013)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 7.69
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker D8 VENTURE Kappa Duo PHOTON II CPAD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0345
_diffrn_reflns_av_unetI/netI     0.0174
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            48838
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         74.559
_diffrn_reflns_theta_min         4.555
_diffrn_source                   'I\mS HB micro-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.541
_exptl_absorpt_correction_T_max  0.7538
_exptl_absorpt_correction_T_min  0.6977
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS-2016/2 (Sheldrick, 2014)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.179
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             552
_exptl_crystal_size_max          0.350
_exptl_crystal_size_mid          0.300
_exptl_crystal_size_min          0.150
_refine_diff_density_max         0.172
_refine_diff_density_min         -0.158
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details
; 
 Flack x determined using 1220 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.10(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     174
_refine_ls_number_reflns         2938
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.059
_refine_ls_R_factor_all          0.0283
_refine_ls_R_factor_gt           0.0282
_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^)+(0.0371P)^2^+0.2874P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0699
_refine_ls_wR_factor_ref         0.0700
_reflns_Friedel_coverage         0.715
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.998
_reflns_number_gt                2929
_reflns_number_total             2938
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9sc04127c2.cif
_cod_data_source_block           V19305
_cod_database_code               1552366
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.833
_shelx_estimated_absorpt_t_max   0.923
_shelx_res_checksum              28788
_shelx_hkl_checksum              9221