Ac2O-Mediated Dearylacetylative Dimerization of 2-Arylacetyl-1-naphthols. Synthesis of Naphtho[1,2-b]furan-3-ones.
Chang, Meng-Yang; Chen, Kuan-Ting; Hsiao, Yu-Ting; Chen, Shin-Mei; The Journal of organic chemistry  (2020) –; doi:10.1021/acs.joc.9b03298

data_4037857
_publ_section_title
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 Ac2O-Mediated Dearylacetylative Dimerization of 2-Arylacetyl-1-naphthols.
 Synthesis of Naphtho[1,2-b]furan-3-ones.
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_journal_name_full               'The Journal of organic chemistry'
_journal_paper_doi               10.1021/acs.joc.9b03298
_journal_year                    2020
_chemical_formula_sum            'C18 H13 Br O2'
_chemical_formula_weight         341.19
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/6
_cell_angle_alpha                90
_cell_angle_beta                 100.2100(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   16.3545(7)
_cell_length_b                   11.9821(5)
_cell_length_c                   7.3657(3)
_cell_measurement_reflns_used    9942
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.3137
_cell_measurement_theta_min      2.5308
_cell_volume                     1420.54(10)
_computing_cell_refinement       'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/6 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0294
_diffrn_reflns_av_unetI/netI     0.0156
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            24966
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.419
_diffrn_reflns_theta_min         1.265
_exptl_absorpt_coefficient_mu    2.895
_exptl_absorpt_correction_T_max  0.9485
_exptl_absorpt_correction_T_min  0.8032
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2014/4 (Bruker AXS Inc.)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.595
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Lump
_exptl_crystal_F_000             688
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.462
_refine_diff_density_min         -0.434
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.077
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     193
_refine_ls_number_reflns         2924
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.077
_refine_ls_R_factor_all          0.0284
_refine_ls_R_factor_gt           0.0231
_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^)+(0.0324P)^2^+1.0659P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0592
_refine_ls_wR_factor_ref         0.0632
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2611
_reflns_number_total             2924
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo9b03298_si_001.cif
_cod_data_source_block           180503LT
_cod_depositor_comments
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The following automatic conversions were performed:

data item '_exptl_crystal_density_meas' value 'not measured' was
changed to '?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 
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_cod_original_cell_volume        1420.53(10)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4037857
_shelxl_version_number           2014/6
_shelx_res_checksum              77584
_shelx_hkl_checksum              11909