Access to highly functionalized imidazolones bearing α-amino acid esters <i>via</i> KOH-promoted annulation of amidines, nitrosoarenes and malonic esters.
Li, Wenhui; Xin, Jie; Zhai, Pingan; Lin, Jianying; Huang, Shuangping; Gao, Wenchao; Li, Xing; Organic & biomolecular chemistry 19 (2021) 6473–6477; doi:10.1039/d1ob00930c

data_7158155
_publ_section_title
;
 Access to highly functionalized imidazolones bearing \a-amino acid esters
 <i>via</i> KOH-promoted annulation of amidines, nitrosoarenes and malonic
 esters.
;
_journal_issue                   29
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              6473
_journal_page_last               6477
_journal_paper_doi               10.1039/d1ob00930c
_journal_volume                  19
_journal_year                    2021
_chemical_formula_moiety         'C24 H21 N3 O3'
_chemical_formula_sum            'C24 H21 N3 O3'
_chemical_formula_weight         399.44
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-06-11
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2021-06-24 deposited with the CCDC.	2021-06-30 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   12.1633(9)
_cell_length_b                   16.9191(14)
_cell_length_c                   20.7850(16)
_cell_measurement_reflns_used    9867
_cell_measurement_temperature    273(2)
_cell_measurement_theta_max      24.572
_cell_measurement_theta_min      2.283
_cell_volume                     4277.4(6)
_computing_cell_refinement       'SAINT v8.37A (Bruker, 2015)'
_computing_data_reduction        'SAINT v8.37A (Bruker, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      273.15
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0544
_diffrn_reflns_av_unetI/netI     0.0299
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            73985
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.357
_diffrn_reflns_theta_min         2.845
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.7049
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1052 before and 0.0562 after correction. The Ratio of minimum to maximum transmission is 0.9453. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.241
_exptl_crystal_description       block
_exptl_crystal_F_000             1680
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.21
_refine_diff_density_max         0.291
_refine_diff_density_min         -0.322
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     272
_refine_ls_number_reflns         5330
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0976
_refine_ls_R_factor_gt           0.0551
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0617P)^2^+1.2521P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1267
_refine_ls_wR_factor_ref         0.1476
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3383
_reflns_number_total             5330
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1ob00930c2.cif
_cod_data_source_block           cww1
_cod_depositor_comments          'Adding full bibliography for 7158155.cif.'
_cod_database_code               7158155
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_max   0.983
_shelx_estimated_absorpt_t_min   0.971
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B)
2.b Aromatic/amide H refined with riding coordinates:
 N3(H3), C7(H7), C20(H20), C11(H11), C24(H24), C14(H14), C8(H8), C18(H18),
 C21(H21), C9(H9), C10(H10), C15(H15), C23(H23), C22(H22), C16(H16), C17(H17)
2.c Idealised Me refined as rotating group:
 C4(H4A,H4B,H4C)
;
_olex2_submission_special_instructions 'No special instructions were received'