TMSOTf-catalyzed synthesis of substituted quinazolines using hexamethyldisilazane as a nitrogen source under neat and microwave irradiation conditions.
Chan, Chieh-Kai; Lai, Chien-Yu; Wang, Cheng-Chung; Organic & biomolecular chemistry 18 (2020) 7201–7212; doi:10.1039/d0ob01507e

data_7157689
_publ_section_title
;
 TMSOTf-catalyzed synthesis of substituted quinazolines using
 hexamethyldisilazane as a nitrogen source under neat and microwave
 irradiation conditions.
;
_journal_issue                   36
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              7201
_journal_page_last               7212
_journal_paper_doi               10.1039/d0ob01507e
_journal_volume                  18
_journal_year                    2020
_chemical_formula_moiety         'C21 H16 N2 O'
_chemical_formula_sum            'C21 H16 N2 O'
_chemical_formula_weight         312.36
_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
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2020-03-05 deposited with the CCDC.	2020-08-31 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   14.6384(3)
_cell_length_b                   6.90900(10)
_cell_length_c                   30.7229(7)
_cell_measurement_reflns_used    9888
_cell_measurement_temperature    100.0(2)
_cell_measurement_theta_max      65.07
_cell_measurement_theta_min      2.88
_cell_volume                     3107.21(11)
_computing_cell_refinement       'APEX3 v2015.9-0 (Bruker AXS)'
_computing_data_collection       'Bruker Instrument Service v2012.12.0.3'
_computing_data_reduction        'SAINT V8.35A (Bruker AXS Inc., 2015)'
_computing_molecular_graphics    'shelXle (C.B. Huebschle, rev 740)'
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_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100.0(2)
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_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0450
_diffrn_reflns_av_unetI/netI     0.0142
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            60225
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        65.073
_diffrn_reflns_theta_max         65.073
_diffrn_reflns_theta_min         2.877
_exptl_absorpt_coefficient_mu    0.656
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.8284
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'Bruker SADABS, 1996'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.335
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1312
_exptl_crystal_size_max          0.288
_exptl_crystal_size_mid          0.184
_exptl_crystal_size_min          0.164
_refine_diff_density_max         0.175
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_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.119
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
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_refine_ls_number_reflns         2641
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.119
_refine_ls_R_factor_all          0.0433
_refine_ls_R_factor_gt           0.0375
_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^)+(0.0472P)^2^+1.3833P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0963
_refine_ls_wR_factor_ref         0.0997
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2367
_reflns_number_total             2641
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0ob01507e2.cif
_cod_data_source_block           i17822
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_crystal_density_meas' value 'none' was changed to
'?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 

 Adding full bibliography for 7157689--7157694.cif.
;
_cod_database_code               7157689
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.834
_shelx_estimated_absorpt_t_max   0.900
_shelx_res_checksum              2194
_shelx_hkl_checksum              39181