Novel Route to 2,3-Substituted Benzo[b]thiophenes via Intramolecular Radical Cyclization
Prabal P. Singh; A. K. Yadav; H. Ila; H. Junjappa; Journal of Organic Chemistry 74 (2009) 5496–5501; doi:10.1021/jo900615p

data_4024666
_publ_contact_author_address
;
Department of Chemistry
Indian Institute of Technology
Kanpur 208016
India
;
_publ_contact_author_name        'Pro.  H. Ila'
_publ_section_title
;
Novel Route to 2,3-Substituted Benzo[b]thiophenes via Intramolecular
Radical Cyclization
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              5496
_journal_page_last               5501
_journal_paper_doi               10.1021/jo900615p
_journal_volume                  74
_journal_year                    2009
_chemical_formula_moiety         'C18 H16 Br N O2 S'
_chemical_formula_sum            'C18 H16 Br N O2 S'
_chemical_formula_weight         390.29
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                81.178(5)
_cell_angle_beta                 86.386(5)
_cell_angle_gamma                79.835(5)
_cell_formula_units_Z            2
_cell_length_a                   6.860(5)
_cell_length_b                   7.634(5)
_cell_length_c                   16.845(5)
_cell_measurement_reflns_used    999
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.46
_cell_measurement_theta_min      2.45
_cell_volume                     857.5(9)
_computing_cell_refinement       'SAINT 6.45 ( Bruker, 2003)'
_computing_data_collection       'SMART 5.628 (Bruker, 2003)'
_computing_data_reduction        'SAINT 6.45 ( Bruker, 2003)'
_computing_molecular_graphics    'DIAMOND 2.1e'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR-97
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.926
_diffrn_measured_fraction_theta_max 0.926
_diffrn_measurement_device_type  'BRUKER SMART APEX'
_diffrn_measurement_method       /w-scans
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0319
_diffrn_reflns_av_sigmaI/netI    0.0613
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            5471
_diffrn_reflns_theta_full        28.46
_diffrn_reflns_theta_max         28.46
_diffrn_reflns_theta_min         2.45
_exptl_absorpt_coefficient_mu    2.527
_exptl_absorpt_correction_T_max  0.7186
_exptl_absorpt_correction_T_min  0.6319
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.512
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             396
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.14
_refine_diff_density_max         1.323
_refine_diff_density_min         -1.895
_refine_diff_density_rms         0.270
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.200
_refine_ls_hydrogen_treatment    refU
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         4015
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.200
_refine_ls_R_factor_all          0.1014
_refine_ls_R_factor_gt           0.0746
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1318P)^2^+7.8177P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2092
_refine_ls_wR_factor_ref         0.2787
_reflns_number_gt                3263
_reflns_number_total             4015
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo900615p_si_002_1.cif
_cod_data_source_block           Compound7b
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4024666