Triflic anhydride mediated synthesis of 3,4-dihydroquinazolines: a three-component one-pot tandem procedure.
Magyar, Christina L.; Wall, Tyler J.; Davies, Steven B.; Campbell, Molly V.; Barna, Haven A.; Smith, Sydney R.; Savich, Christopher J.; Mosey, R. Adam; Organic & biomolecular chemistry 17 (2019) 7995–8000; doi:10.1039/c9ob01596e

data_7157036
_publ_section_title
;
 Triflic anhydride mediated synthesis of 3,4-dihydroquinazolines: a
 three-component one-pot tandem procedure.
;
_journal_issue                   34
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              7995
_journal_page_last               8000
_journal_paper_doi               10.1039/c9ob01596e
_journal_volume                  17
_journal_year                    2019
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C28 H24 N2 O'
_chemical_formula_sum            'C28 H24 N2 O'
_chemical_formula_weight         404.49
_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'
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-08-20
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2018-08-20 deposited with the CCDC.    2019-08-08 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.3870(8)
_cell_length_b                   12.8591(8)
_cell_length_c                   12.5553(8)
_cell_measurement_reflns_used    7459
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.22
_cell_measurement_theta_min      2.20
_cell_volume                     2161.3(2)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_collection       'COSMO (BRUKER, V1.61, 2009)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_publication_material
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement
'SHELXL (Sheldrick, Acta Cryst. A64 2008, 112-122)'
_computing_structure_solution
'SHELXT (Sheldrick, G.M. (2015). Acta Cryst. A71, 3-8)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 8.36
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0381
_diffrn_reflns_av_unetI/netI     0.0325
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            16762
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.371
_diffrn_reflns_theta_min         2.196
_diffrn_source                   'sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.076
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6743
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2014/5 (Bruker,2014/5) was used for absorption correction. wR2(int) was 0.0583 before and 0.0549 after correction. The Ratio of minimum to maximum transmission is 0.9049. The \l/2 correction factor is 0.00150.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.243
_exptl_crystal_description       block
_exptl_crystal_F_000             856
_exptl_crystal_recrystallization_method 'used as received'
_exptl_crystal_size_max          0.335
_exptl_crystal_size_mid          0.321
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.119
_refine_diff_density_min         -0.166
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details
;
 Flack x determined using 1436 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.3(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     281
_refine_ls_number_reflns         3954
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0478
_refine_ls_R_factor_gt           0.0400
_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^)+(0.0557P)^2^+0.1770P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0967
_refine_ls_wR_factor_ref         0.1035
_reflns_Friedel_coverage         0.904
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.998
_reflns_number_gt                3442
_reflns_number_total             3954
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9ob01596e2.cif
_cod_data_source_block           ram717a
_cod_depositor_comments          'Adding full bibliography for 7157036.cif.'
_cod_database_code               7157036
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.984
_shelx_estimated_absorpt_t_min   0.975
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C2(H2)
2.b Secondary CH2 refined with riding coordinates:
 C9(H9A,H9B)
2.c Aromatic/amide H refined with riding coordinates:
 C4(H4), C5(H5), C7(H7), C11(H11), C12(H12), C13(H13), C14(H14), C15(H15),
 C17(H17), C18(H18), C19(H19), C20(H20), C21(H21), C23(H23), C24(H24), C25(H25),
  C26(H26), C27(H27)
2.d Idealised Me refined as rotating group:
 C28(H28A,H28B,H28C)
;
_shelx_res_checksum              43370
_olex2_diffrn_ambient_temperature_device 'Oxford Cryosystems'
_olex2_exptl_crystal_mounting_method
'The crystal was mounted on a nylon loop with paratone oil'
_olex2_submission_original_sample_id CM-2-131
_olex2_submission_special_instructions 'No special instructions were received'