Total Synthesis and Structural Determination of the Dimeric Tetrahydroxanthone Ascherxanthone A.
Xiao, Zheming; Li, Yayue; Gao, Shuanhu; Organic letters 19 (2017) 1834–1837; doi:10.1021/acs.orglett.7b00592

data_1545964
_publ_section_title
;
 Total Synthesis and Structural Determination of the Dimeric
 Tetrahydroxanthone Ascherxanthone A.
;
_journal_issue                   7
_journal_name_full               'Organic letters'
_journal_page_first              1834
_journal_page_last               1837
_journal_paper_doi               10.1021/acs.orglett.7b00592
_journal_volume                  19
_journal_year                    2017
_chemical_formula_sum            'C32 H34 O10'
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_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 96.493(2)
_cell_angle_gamma                90.00
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_cell_length_a                   9.4676(5)
_cell_length_b                   15.2732(7)
_cell_length_c                   12.2821(6)
_cell_measurement_reflns_used    5894
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      22.16
_cell_measurement_theta_min      2.54
_cell_volume                     1764.61(15)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker Smart Apex II CCD'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
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_exptl_absorpt_coefficient_mu    0.081
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_exptl_absorpt_correction_T_min  0.9699
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.089
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             612
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.29
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_platon_squeeze_details
;
;
_refine_diff_density_max         0.154
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_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.5(9)
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_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0753P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1153
_refine_ls_wR_factor_ref         0.1218
_reflns_number_gt                4912
_reflns_number_total             6213
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol7b00592_si_002.cif
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_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/home/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1545964