Synthesis of 2-N/S/C-substituted benzothiazoles via intramolecular cyclative cleavage of benzotriazole ring.
Kumar, Dhananjay; Mishra, Bhuwan B.; Tiwari, Vinod K.; The Journal of organic chemistry 79 (2014) 251–266; doi:10.1021/jo4024107

data_4029067
_publ_section_title
;
 Synthesis of 2-N/S/C-substituted benzothiazoles via intramolecular
 cyclative cleavage of benzotriazole ring.
;
_journal_issue                   1
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              251
_journal_page_last               266
_journal_paper_doi               10.1021/jo4024107
_journal_volume                  79
_journal_year                    2014
_chemical_formula_moiety         'C20 H21 N3 S'
_chemical_formula_sum            'C20 H21 N3 S'
_chemical_formula_weight         335.46
_chemical_melting_point          122
_chemical_name_systematic
(E)-2-(4-Cinnamylpiperazin-1-yl)benzo[d]thiazole
_space_group_IT_number           9
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      9
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 c 1'
_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                 110.984(17)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.0723(9)
_cell_length_b                   37.105(3)
_cell_length_c                   8.4532(11)
_cell_measurement_reflns_used    429
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.1709
_cell_measurement_theta_min      3.2951
_cell_volume                     1778.3(4)
_computing_cell_refinement       'CrysAlis Pro, Agilent Technologies'
_computing_data_collection       'CrysAlis Pro, Agilent Technologies'
_computing_data_reduction        'CrysAlis Pro, Agilent Technologies'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 16.0938
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.892
_diffrn_measurement_device_type  'XCalibur Eos, Oxford Diffraction'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0451
_diffrn_reflns_av_sigmaI/netI    0.0700
_diffrn_reflns_limit_h_max       3
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       38
_diffrn_reflns_limit_k_min       -48
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            2619
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         29.18
_diffrn_reflns_theta_min         3.29
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.188
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.95273
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlisPro, Agilent Technologies'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.253
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             712
_exptl_crystal_recrystallization_method 'ethyl acetate, hexane, rt, 1 atm'
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.175
_refine_diff_density_min         -0.179
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.11(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.992
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         1843
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      0.992
_refine_ls_R_factor_all          0.0958
_refine_ls_R_factor_gt           0.0515
_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^)+(0.0210P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0720
_refine_ls_wR_factor_ref         0.0871
_reflns_number_gt                1175
_reflns_number_total             1843
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            jo4024107_si_002.cif
_cod_data_source_block           compound_4b
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_hydrogen_treatment' value 'Constr' changed to 'constr'
according to
/usr/data/users/saulius/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      'C c'
_cod_database_code               4029067