KOtBu-Mediated Annulation for the Pot-Economical Synthesis of Quinazolinobenzoxazepines
Basak, Soumya Jyoti; Dash, Jyotirmayee; Chemical Communications  (2025) –; doi:10.1039/D5CC02401C

data_7134845
_publ_section_title
;
 KOtBu-Mediated Annulation for the Pot-Economical Synthesis of
 Quinazolinobenzoxazepines
;
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/D5CC02401C
_journal_year                    2025
_chemical_formula_moiety         'C20 H14 N2 O2'
_chemical_formula_sum            'C20 H14 N2 O2'
_chemical_formula_weight         314.33
_space_group_crystal_system      orthorhombic
_space_group_IT_number           33
_space_group_name_Hall           'P 2c -2n'
_space_group_name_H-M_alt        'P n a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_audit_creation_date             2024-12-27
_audit_creation_method
;
Olex2 1.5
(compiled 2022.04.07 svn.rca3783a0 for OlexSys, GUI svn.r6498)
;
_audit_update_record
;
2025-01-02 deposited with the CCDC.	2025-07-17 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.052(3)
_cell_length_b                   22.635(5)
_cell_length_c                   4.2116(8)
_cell_measurement_reflns_used    2718
_cell_measurement_temperature    160.01
_cell_measurement_theta_max      25.08
_cell_measurement_theta_min      2.25
_cell_volume                     1434.9(5)
_computing_cell_refinement       'SAINT V8.40B (?, 2016)'
_computing_data_reduction        'SAINT V8.40B (?, 2016)'
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'olex2.refine 1.5 (Bourhis et al., 2015)'
_computing_structure_solution    'olex2.solve 1.5 (Bourhis et al., 2015)'
_diffrn_ambient_temperature      160.01
_diffrn_detector                 'CCD area detector'
_diffrn_detector_area_resol_mean 5.6
_diffrn_detector_type            'Bruker SMART CCD 6000 area detector'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker SMART CCD 6000 area detector'
_diffrn_measurement_method       '\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  0.1281
_diffrn_reflns_av_unetI/netI     0.0823
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       4
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            13575
_diffrn_reflns_point_group_measured_fraction_full 0.904
_diffrn_reflns_point_group_measured_fraction_max 0.898
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.381
_diffrn_reflns_theta_min         2.251
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_current           1.0
_diffrn_source_power             0.05
_diffrn_source_target            Mo
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.096
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.5304
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1461 before and 0.1064 after correction.
The Ratio of minimum to maximum transmission is 0.7118.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'clear whiteish white'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   whiteish
_exptl_crystal_colour_primary    white
_exptl_crystal_density_diffrn    1.455
_exptl_crystal_description       needle
_exptl_crystal_F_000             656
_exptl_crystal_preparation       'Slow evaporation of Isoprpanol'
_exptl_crystal_recrystallization_method 'Slow evaporation'
_exptl_crystal_size_max          0.07
_exptl_crystal_size_mid          0.02
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.343
_refine_diff_density_min         -0.336
_refine_diff_density_rms         0.087
_refine_ls_abs_structure_details
;
 Flack x determined using 469 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   1.2(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.167
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         2357
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.166
_refine_ls_R_factor_all          0.1261
_refine_ls_R_factor_gt           0.0702
_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^)+(0.1025P)^2^+0.6704P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1627
_refine_ls_wR_factor_ref         0.2181
_reflns_Friedel_coverage         0.569
_reflns_Friedel_fraction_full    0.777
_reflns_Friedel_fraction_max     0.765
_reflns_number_gt                1561
_reflns_number_total             2357
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5cc02401c2.cif
_cod_data_source_block           mo_jd281024_0ma_a
_cod_database_code               7134845
_shelx_shelxl_version_number     2019/1
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C20(H20a,H20b), C19(H19a,H19b)
2.b Aromatic/amide H refined with riding coordinates:
 C15(H15), C1(H1), C2(H2), C11(H11), C12(H12), C16(H16), C18(H18), C4(H4),
 C3(H3), C17(H17)
;
_shelx_res_checksum              70903
_shelx_hkl_checksum              49093
_olex2_submission_special_instructions 'No special instructions were received'