One-step synthesis of pyrido[1,2-a]benzimidazole derivatives by a novel multicomponent reaction of chloroacetonitrile, malononitrile, aromatic aldehyde, and pyridine.
Yan, Chao Guo; Wang, Qi Fang; Song, Xiao Kai; Sun, Jing; The Journal of organic chemistry 74 (2009) 710–718; doi:10.1021/jo802166t

data_4029492
_publ_section_title
;
 One-step synthesis of pyrido[1,2-a]benzimidazole derivatives by a novel
 multicomponent reaction of chloroacetonitrile, malononitrile, aromatic
 aldehyde, and pyridine.
;
_journal_issue                   2
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              710
_journal_page_last               718
_journal_paper_doi               10.1021/jo802166t
_journal_volume                  74
_journal_year                    2009
_chemical_formula_moiety         C37H36N4,C2H6O
_chemical_formula_sum            'C39 H42 N4 O'
_chemical_formula_weight         582.77
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 91.727(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.8905(14)
_cell_length_b                   18.936(2)
_cell_length_c                   14.3773(15)
_cell_measurement_reflns_used    4949
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.6
_cell_measurement_theta_min      2.35
_cell_volume                     3507.8(6)
_computing_cell_refinement       'Bruker SMART'
_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      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
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_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            25196
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         1.78
_exptl_absorpt_coefficient_mu    0.067
_exptl_absorpt_correction_T_max  0.9802
_exptl_absorpt_correction_T_min  0.9770
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.103
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1248
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.396
_refine_diff_density_min         -0.480
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.086
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_refine_ls_matrix_type           full
_refine_ls_number_parameters     365
_refine_ls_number_reflns         6183
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.105
_refine_ls_R_factor_all          0.0970
_refine_ls_R_factor_gt           0.0684
_refine_ls_shift/su_max          0.021
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1165P)^2^+1.4890P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2008
_refine_ls_wR_factor_ref         0.2305
_reflns_number_gt                4190
_reflns_number_total             6183
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo802166t_si_001.cif
_cod_data_source_block           2j
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' tag value ''Monoclinic'' was replaced with
'monoclinic' value as specified in the replacement file
'/home/robertas/cod-tools/perl-scripts/inputs/replacement_values.lst'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_Hall     -P2yn
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               4029492