FeCl3and ether mediated direct intramolecular acylation of esters and their application in efficient preparation of xanthone and chromone derivatives
Jiang, Neng; Li, Su-Yi; Xie, Sai-Sai; Yao, Hequan; Sun, Hongbin; Wang, Xiao-Bing; Kong, Ling-Yi; RSC Adv. 4 (2014) 63632–; doi:10.1039/C4RA10174J

data_7218901
_publ_section_title
;
 FeCl3and ether mediated direct intramolecular acylation of esters and
 their application in efficient preparation of xanthone and chromone
 derivatives
;
_journal_issue                   109
_journal_name_full               'RSC Adv.'
_journal_page_first              63632
_journal_paper_doi               10.1039/C4RA10174J
_journal_volume                  4
_journal_year                    2014
_chemical_absolute_configuration unk
_chemical_formula_sum            'C13 H8 O2'
_chemical_formula_weight         196.19
_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
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   4.8978(14)
_cell_length_b                   13.654(5)
_cell_length_c                   14.129(5)
_cell_measurement_reflns_used    1016
_cell_measurement_temperature    291(2)
_cell_measurement_theta_max      71.0518
_cell_measurement_theta_min      6.2599
_cell_volume                     944.9(6)
_computing_cell_refinement       'CrysAlisPro (Agilent Technologies)'
_computing_data_collection       'CrysAlisPro (Agilent Technologies)'
_computing_data_reduction        'CrysAlisPro (Agilent Technologies)'
_computing_molecular_graphics    'Ortep-3 (L. J. Farrugia, 2001)'
_computing_publication_material  SHELXL-2013
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      291(2)
_diffrn_detector_area_resol_mean 15.9149
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Gemini S Ultra, Agilent Technologies'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0655
_diffrn_reflns_av_unetI/netI     0.0396
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.982
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            7057
_diffrn_reflns_point_group_measured_fraction_full 0.991
_diffrn_reflns_point_group_measured_fraction_max 0.968
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         71.188
_diffrn_reflns_theta_min         6.265
_diffrn_source                   'Enhance Ultra (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.754
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.76014
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.21 (release 14-08-2012 CrysAlis171 .NET)
(compiled Sep 14 2012,17:21:16)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.379
_exptl_crystal_description       block
_exptl_crystal_F_000             408
_exptl_crystal_size_max          0.360
_exptl_crystal_size_mid          0.320
_exptl_crystal_size_min          0.250
_refine_diff_density_max         0.254
_refine_diff_density_min         -0.212
_refine_diff_density_rms         0.056
_refine_ls_abs_structure_details
;
 Flack x determined using 223 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   -0.0(7)
_refine_ls_extinction_coef       0.0059(8)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.002
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     137
_refine_ls_number_reflns         1762
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.1625
_refine_ls_R_factor_gt           0.1100
_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^)+(0.0020P)^2^+2.2200P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1685
_refine_ls_wR_factor_ref         0.1900
_reflns_Friedel_coverage         0.641
_reflns_Friedel_fraction_full    0.982
_reflns_Friedel_fraction_max     0.948
_reflns_number_gt                877
_reflns_number_total             1762
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4ra10174j2.cif
_cod_data_source_block           shelxl
_cod_database_code               7218901
_shelx_estimated_absorpt_t_min   0.773
_shelx_estimated_absorpt_t_max   0.834
_shelxl_version_number           2013-4
_shelx_res_checksum              96667