Tandem intramolecular cyclisation/1,3-aryl shift in N-(4,4-diethoxybutyl)-1-arylmethanimines (Kazan reaction): synthesis of 3-benzylidene-1-pyrrolines
Smolobochkin, A. V.; Gazizov, A. S.; Melyashova, A. S.; Voronina, J. K.; Strelnik, A. G.; Vatsadze, S. Z.; Burilov, A. R.; Pudovik, M. A.; Fedorova, O. A.; Sinyashin, O. G.; RSC Advances 7 (2017) 50955–; doi:10.1039/C7RA11216E

data_7229463
_publ_section_title
;
 Tandem intramolecular cyclisation/1,3-aryl shift in
 N-(4,4-diethoxybutyl)-1-arylmethanimines (Kazan reaction): synthesis of
 3-benzylidene-1-pyrrolines
;
_journal_issue                   80
_journal_name_full               'RSC Advances'
_journal_page_first              50955
_journal_paper_doi               10.1039/C7RA11216E
_journal_volume                  7
_journal_year                    2017
_chemical_formula_moiety         'C13 H12 F3 N O2'
_chemical_formula_sum            'C13 H12 F3 N O2'
_chemical_formula_weight         271.24
_chemical_name_common
'(E)-4-benzylidene-3,4-dihydro-2H-pyrrol-1-ium 2,2,2-trifluoroacetate'
_chemical_name_systematic
'(E)-4-benzylidene-3,4-dihydro-2H-pyrrol-1-ium 2,2,2-trifluoroacetate'
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2017-04-14 deposited with the CCDC.
2017-10-27 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 97.423(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.578(3)
_cell_length_b                   10.2118(19)
_cell_length_c                   9.1356(17)
_cell_measurement_reflns_used    1276
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      20.70
_cell_measurement_theta_min      3.49
_cell_volume                     1256.1(4)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0710
_diffrn_reflns_av_sigmaI/netI    0.0576
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            13498
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.50
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.126
_exptl_absorpt_correction_T_max  0.9875
_exptl_absorpt_correction_T_min  0.9813
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.434
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             560
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.120
_refine_diff_density_min         -0.136
_refine_diff_density_rms         0.030
_refine_ls_extinction_coef       0.0067(16)
_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   1.060
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     205
_refine_ls_number_reflns         2458
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.060
_refine_ls_R_factor_all          0.1230
_refine_ls_R_factor_gt           0.0430
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0428P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0890
_refine_ls_wR_factor_ref         0.1166
_reflns_number_gt                1189
_reflns_number_total             2458
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7ra11216e2.cif
_cod_data_source_block           s100_fin
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7229463