Synthesis of the bis(cyclohexenone) core of (−)-lomaiviticin A
Rose, John A.; Mahapatra, Subham; Li, Xin; Wang, Chao; Chen, Lei; Swick, Steven M.; Herzon, Seth B.; Chemical Science  (2020) –; doi:10.1039/D0SC02770G

data_1558555
_publ_section_title
;
 Synthesis of the bis(cyclohexenone) core of (&#x2212;)-lomaiviticin A
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/D0SC02770G
_journal_year                    2020
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C58 H86 O16 S2 Si2'
_chemical_formula_sum            'C58 H86 O16 S2 Si2'
_chemical_formula_weight         1159.56
_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     SHELXT
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2020-05-05 deposited with the CCDC.	2020-06-18 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   17.8150(12)
_cell_length_b                   18.8153(13)
_cell_length_c                   19.2663(13)
_cell_measurement_reflns_used    998
_cell_measurement_temperature    93(2)
_cell_measurement_theta_max      68.3
_cell_measurement_theta_min      2.4
_cell_volume                     6458.0(8)
_computing_cell_refinement       'CrystalClear-SM Expert 2.0 r15 (Rigaku, 2011)'
_computing_data_collection       'CrystalClear-SM Expert 2.0 r15 (Rigaku, 2011)'
_computing_data_reduction        'CrystalClear-SM Expert 2.0 r15 (Rigaku, 2011)'
_computing_molecular_graphics
; 
Dolomanov, O.V.; Bourhis, L.J.; Gildea, R.J.; Howard, J.A.K.; Puschmann, H., 
OLEX2: A complete structure solution, refinement and analysis program 
(2009). J. Appl. Cryst., 42, 339-341. 
;
_computing_publication_material  'CIFTAB-2014/2 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXT-2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      93(2)
_diffrn_detector_area_resol_mean 22.2
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Rigaku Saturn 944+ CCD'
_diffrn_measurement_method       \w
_diffrn_radiation_source         'microfocus rotating anode'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.157
_diffrn_reflns_av_unetI/netI     0.0642
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            11690
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.991
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         68.094
_diffrn_reflns_theta_min         3.283
_exptl_absorpt_coefficient_mu    1.611
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.695
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private Communication'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.193
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             2488
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.020
_refine_diff_density_max         0.552
_refine_diff_density_min         -0.375
_refine_diff_density_rms         0.096
_refine_ls_abs_structure_details
; 
 Flack x determined using 3737 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.032(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.086
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     720
_refine_ls_number_reflns         11690
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.0823
_refine_ls_R_factor_gt           0.0711
_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^)+(0.1546P)^2^+0.6458P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2108
_refine_ls_wR_factor_ref         0.2205
_reflns_Friedel_coverage         0.814
_reflns_Friedel_fraction_full    0.993
_reflns_Friedel_fraction_max     0.986
_reflns_number_gt                9949
_reflns_number_total             11690
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0sc02770g2.cif
_cod_data_source_block           007-16115
_cod_database_code               1558555
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.739
_shelx_estimated_absorpt_t_max   0.968
_shelx_res_checksum              71310