A one-pot regioselective synthesis of benzo[d]imidazo[2,1-b]thiazoles.
Zhang, Xinhai; Jia, Jiong; Ma, Chen; Organic & biomolecular chemistry 10 (2012) 7944–7948; doi:10.1039/c2ob26211h

data_7152659
_publ_section_title
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 A one-pot regioselective synthesis of benzo[d]imidazo[2,1-b]thiazoles.
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_journal_issue                   39
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              7944
_journal_page_last               7948
_journal_paper_doi               10.1039/c2ob26211h
_journal_volume                  10
_journal_year                    2012
_chemical_formula_sum            'C13 H6 F3 N3 S'
_chemical_formula_weight         293.27
_chemical_name_systematic
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?
;
_space_group_IT_number           41
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'A 2 -2ab'
_symmetry_space_group_name_H-M   'A b a 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   17.790(4)
_cell_length_b                   20.166(4)
_cell_length_c                   6.7371(13)
_cell_measurement_temperature    273(2)
_cell_volume                     2417.0(9)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      273(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0257
_diffrn_reflns_av_sigmaI/netI    0.0304
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            5767
_diffrn_reflns_theta_full        24.98
_diffrn_reflns_theta_max         24.98
_diffrn_reflns_theta_min         2.02
_exptl_absorpt_coefficient_mu    0.297
_exptl_crystal_density_diffrn    1.612
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1184
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.173
_refine_diff_density_min         -0.176
_refine_diff_density_rms         0.033
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(4)
_refine_ls_extinction_coef       0.00234(5)
_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   1.038
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         2104
_refine_ls_number_restraints     118
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0450
_refine_ls_R_factor_gt           0.0317
_refine_ls_shift/su_max          0.011
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0373P)^2^+0.9282P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0760
_refine_ls_wR_factor_ref         0.0841
_reflns_number_gt                1670
_reflns_number_total             2104
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ob26211h.txt
_cod_data_source_block           p
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_cell_volume        2417.0(8)
_cod_original_sg_symbol_H-M      'Aba2 '
_cod_database_code               7152659