Direct, efficient, solvent-free synthesis of 2-aryl-1,2,3,4-tetrahydroquinazolines
Correa, Waldo H.; Papadopoulos, Stavroula; Radnidge, Peta; Roberts, Brett A.; Scott, Janet L.; Green Chemistry 4 (2002) 245–; doi:10.1039/b202729c

data_7204413
_publ_section_title
;
 Direct, efficient, solvent-free synthesis of
 2-aryl-1,2,3,4-tetrahydroquinazolines
;
_journal_issue                   3
_journal_name_full               'Green Chemistry'
_journal_page_first              245
_journal_paper_doi               10.1039/b202729c
_journal_volume                  4
_journal_year                    2002
_chemical_formula_moiety         'C21 H18 N2 O2'
_chemical_formula_sum            'C21 H18 N2 O2'
_chemical_formula_weight         330.37
_chemical_melting_point          377.4(15)
_chemical_name_common
N-2[(salicylideneimino)benzyl]-salicylideneimine
_chemical_name_systematic
;
N-2[(salicylideneimino)benzyl]-salicylideneimine
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 97.056(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.7200(2)
_cell_length_b                   14.0370(2)
_cell_length_c                   12.20580(10)
_cell_measurement_temperature    123(2)
_cell_volume                     1652.74(4)
_computing_cell_refinement       'Nonius Collect'
_computing_data_collection       'Nonius Collect'
_computing_data_reduction        'Nonius Collect'
_computing_molecular_graphics    Xseed
_computing_publication_material  Ciftab
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.962
_diffrn_measured_fraction_theta_max 0.962
_diffrn_measurement_device_type  'Enraf Nonius Kappa CCD'
_diffrn_measurement_method       '\phi + w scans'
_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  0.0574
_diffrn_reflns_av_sigmaI/netI    0.0552
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            24372
_diffrn_reflns_theta_full        29.75
_diffrn_reflns_theta_max         29.75
_diffrn_reflns_theta_min         3.35
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.328
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rhombs
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.200
_refine_diff_density_min         -0.260
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.987
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     228
_refine_ls_number_reflns         4542
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.987
_refine_ls_R_factor_all          0.0915
_refine_ls_R_factor_gt           0.0470
_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^)+(0.0693P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1074
_refine_ls_wR_factor_ref         0.1256
_reflns_number_gt                2820
_reflns_number_total             4542
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b202729c.txt
_cod_data_source_block           5e
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/adriana/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1555 2011-01-17 13:19:09Z saulius 

The following automatic conversions were performed:

'_chemical_melting_point' value '102.8-105.8 Deg. C' was changed to
'377.4(15)' - it was converted from degrees Celsius(C) to Kelvins(K),
the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1569 2011-02-09 13:29:24Z adriana 
;
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7204413