Rearrangement of Quinoxalin-2-ones When Exposed to Enamines Generated in Situ from Ketones and Ammonium Acetate: Method for the Synthesis of 1-(Pyrrolyl)benzimidazolones.
Mamedov, Vakhid A.; Zhukova, Nataliya A.; Beschastnova, Tat'yana N.; Syakaev, Victor V.; Krivolapov, Dmitry B.; Mironova, Ekaterina V.; Zamaletdinova, Anastasiya I.; Rizvanov, Il'dar Kh; Latypov, Shamil K.; The Journal of organic chemistry 80 (2015) 1375–1386; doi:10.1021/jo502135d

data_4030450
_publ_section_title
;
 Rearrangement of Quinoxalin-2-ones When Exposed to Enamines Generated in
 Situ from Ketones and Ammonium Acetate: Method for the Synthesis of
 1-(Pyrrolyl)benzimidazolones.
;
_journal_issue                   3
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              1375
_journal_page_last               1386
_journal_paper_doi               10.1021/jo502135d
_journal_volume                  80
_journal_year                    2015
_chemical_formula_moiety         'C23 H17 N3 O'
_chemical_formula_sum            'C23 H17 N3 O'
_chemical_formula_weight         351.40
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_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                 90.178(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.2976(13)
_cell_length_b                   17.593(4)
_cell_length_c                   18.456(5)
_cell_measurement_reflns_used    4619
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      29.26
_cell_measurement_theta_min      2.32
_cell_volume                     1720.1(7)
_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      150(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \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  0.0502
_diffrn_reflns_av_sigmaI/netI    0.0442
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            13249
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.60
_diffrn_source                   'fine-focus sealed tube'
_diffrn_source_type              'Kappa Apex II CCD'
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.9958
_exptl_absorpt_correction_T_min  0.9832
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
G.M. Sheldrick (1998a). SADABS v.2.01, Bruker.
Siemens Area Detector Absorption Correction Program.
Bruker AXS. Madison. Wisconsin. USA
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.357
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.253
_refine_diff_density_min         -0.334
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.940
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     252
_refine_ls_number_reflns         3377
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.940
_refine_ls_R_factor_all          0.0538
_refine_ls_R_factor_gt           0.0434
_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^)+(0.0582P)^2^+0.8875P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1070
_refine_ls_wR_factor_ref         0.1156
_reflns_number_gt                2766
_reflns_number_total             3377
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo502135d_si_004.cif
_cod_data_source_block           v497_finall
_cod_depositor_comments
'Adding full bibliography for 4030450--4030452.cif.'
_cod_original_cell_volume        1720.2(7)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4030450