Synthesis of a family of 3-alkyl- or 3-aryl-substituted 1,2-dihydroquinazolinium salts and their isomerization to 4-iminium-1,2,3,4-tetrahydroquinolines.
Vicente, José; Chicote, María Teresa; Martínez-Martínez, Antonio Jesús; Bautista, Delia; Jones, Peter G.; Organic & biomolecular chemistry 9 (2011) 2279–2285; doi:10.1039/c0ob00982b

data_7151793
_publ_section_title
;
 Synthesis of a family of 3-alkyl- or 3-aryl-substituted
 1,2-dihydroquinazolinium salts and their isomerization to
 4-iminium-1,2,3,4-tetrahydroquinolines.
;
_journal_issue                   7
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2279
_journal_page_last               2285
_journal_paper_doi               10.1039/c0ob00982b
_journal_volume                  9
_journal_year                    2011
_chemical_formula_sum            'C24 H23 F3 N2 O3 S'
_chemical_formula_weight         476.50
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                   17.6246(14)
_cell_length_b                   12.9407(11)
_cell_length_c                   20.1134(17)
_cell_measurement_reflns_used    6472
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      22.78
_cell_measurement_theta_min      2.20
_cell_volume                     4587.4(7)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.26
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.959
_diffrn_measurement_device_type  'Bruker SMART APEX CCD'
_diffrn_measurement_method       \w-scan
_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  0.0599
_diffrn_reflns_av_sigmaI/netI    0.0375
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            54529
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.81
_diffrn_reflns_theta_min         2.03
_exptl_absorpt_coefficient_mu    0.194
_exptl_absorpt_correction_T_max  0.9771
_exptl_absorpt_correction_T_min  0.8769
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.380
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1984
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.12
_refine_diff_density_max         1.303
_refine_diff_density_min         -0.985
_refine_diff_density_rms         0.084
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    'NH free, rigid methyls, others riding'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     297
_refine_ls_number_reflns         5745
_refine_ls_number_restraints     46
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          0.1136
_refine_ls_R_factor_gt           0.0837
_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^)+(0.0979P)^2^+9.4262P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2030
_refine_ls_wR_factor_ref         0.2232
_reflns_number_gt                4168
_reflns_number_total             5745
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0ob00982b.txt
_cod_data_source_block           ajf53bsi
_cod_original_sg_symbol_H-M      'P bca'
_cod_database_code               7151793