Synthesis of fluorinated fused benzofurans and benzothiophenes: Smiles-type rearrangement and cyclisation of perfluoro(het)aryl ethers and sulfides.
Ponce González, Julia; Edgar, Mark; Elsegood, Mark R. J.; Weaver, George W.; Organic & biomolecular chemistry 9 (2011) 2294–2305; doi:10.1039/c0ob00790k

data_7151748
_publ_section_title
;
 Synthesis of fluorinated fused benzofurans and benzothiophenes:
 Smiles-type rearrangement and cyclisation of perfluoro(het)aryl ethers
 and sulfides.
;
_journal_issue                   7
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2294
_journal_page_last               2305
_journal_paper_doi               10.1039/c0ob00790k
_journal_volume                  9
_journal_year                    2011
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C11 H5 F4 N O'
_chemical_formula_sum            'C11 H5 F4 N O'
_chemical_formula_weight         243.16
_space_group_IT_number           110
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'I 4bw -2c'
_symmetry_space_group_name_H-M   'I 41 c d'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   'all non-H atoms found by direct methods'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   13.0912(7)
_cell_length_b                   13.0912(7)
_cell_length_c                   23.1759(12)
_cell_measurement_reflns_used    4965
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.79
_cell_measurement_theta_min      2.82
_cell_volume                     3971.9(4)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX 2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX 2 CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0208
_diffrn_reflns_av_sigmaI/netI    0.0096
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            12777
_diffrn_reflns_theta_full        28.33
_diffrn_reflns_theta_max         28.33
_diffrn_reflns_theta_min         2.82
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.156
_exptl_absorpt_correction_T_max  0.969
_exptl_absorpt_correction_T_min  0.914
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS v2007/2, Sheldrick, G.M., (2007)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.627
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1952
_exptl_crystal_size_max          0.59
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.156
_refine_diff_density_min         -0.156
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.058
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     155
_refine_ls_number_reflns         1268
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.058
_refine_ls_R_factor_all          0.0336
_refine_ls_R_factor_gt           0.0305
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0442P)^2^+1.3858P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0824
_refine_ls_wR_factor_ref         0.0849
_reflns_number_gt                1158
_reflns_number_total             1268
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c0ob00790k.txt
_cod_data_source_block           4
_cod_original_sg_symbol_H-M      I4(1)cd
_cod_database_code               7151748