One-pot synthesis of azepine spiro[4.6]-γ-lactams by a Hantzsch-type reaction.
Hopkins, Scarlet L.; Clarke, Kristen T.; Clegg, Jack K.; Gee, William J.; Organic & biomolecular chemistry 23 (2025) 614–618; doi:10.1039/d4ob01719f

data_7160268
_publ_section_title
;
 One-pot synthesis of azepine spiro[4.6]-&#x3b3;-lactams by a
 Hantzsch-type reaction.
;
_journal_issue                   3
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              614
_journal_page_last               618
_journal_paper_doi               10.1039/d4ob01719f
_journal_volume                  23
_journal_year                    2025
_chemical_formula_moiety         'C27 H15 Br N2 O3, 1[H2O]'
_chemical_formula_sum            'C27 H17 Br N2 O4'
_chemical_formula_weight         513.33
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2024-10-11
_audit_creation_method
;
Olex2 1.5
(compiled 2024.01.12 svn.r2f8d729c for OlexSys, GUI svn.r6928)
;
_audit_update_record
;
2024-10-11 deposited with the CCDC.	2024-11-27 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 113.100(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.5296(5)
_cell_length_b                   20.1852(13)
_cell_length_c                   12.1204(8)
_cell_measurement_reflns_used    5298
_cell_measurement_temperature    150.00
_cell_measurement_theta_max      67.406
_cell_measurement_theta_min      4.381
_cell_volume                     2369.5(3)
_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  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      150.00
_diffrn_measured_fraction_theta_full 0.978
_diffrn_measured_fraction_theta_max 0.978
_diffrn_measurement_device_type  BrukerD8
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.1503
_diffrn_reflns_av_unetI/netI     0.0623
_diffrn_reflns_Laue_measured_fraction_full 0.978
_diffrn_reflns_Laue_measured_fraction_max 0.978
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            33994
_diffrn_reflns_point_group_measured_fraction_full 0.978
_diffrn_reflns_point_group_measured_fraction_max 0.978
_diffrn_reflns_theta_full        50.431
_diffrn_reflns_theta_max         50.431
_diffrn_reflns_theta_min         4.381
_diffrn_source_current           1.0
_diffrn_source_power             0.05
_diffrn_source_voltage           50.0
_exptl_absorpt_coefficient_mu    2.667
_exptl_absorpt_correction_T_max  0.7531
_exptl_absorpt_correction_T_min  0.5589
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016) was used for absorption correction.
wR2(int) was 0.1632 before and 0.0979 after correction.
The Ratio of minimum to maximum transmission is 0.7421.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'dark violet'
_exptl_crystal_colour_modifier   dark
_exptl_crystal_colour_primary    violet
_exptl_crystal_density_diffrn    1.439
_exptl_crystal_description       needle
_exptl_crystal_F_000             1040
_exptl_crystal_size_max          0.01
_exptl_crystal_size_mid          0.001
_exptl_crystal_size_min          0.001
_refine_diff_density_max         0.515
_refine_diff_density_min         -0.770
_refine_diff_density_rms         0.112
_refine_ls_extinction_coef       0.0033(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     299
_refine_ls_number_reflns         2435
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0897
_refine_ls_R_factor_gt           0.0733
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1309P)^2^+6.5801P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1962
_refine_ls_wR_factor_ref         0.2098
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1921
_reflns_number_total             2435
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4ob01719f2.cif
_cod_data_source_block           cu_dwg24jc04
_cod_depositor_comments
'Adding full bibliography for 7160265--7160271.cif.'
_cod_database_code               7160268
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.997
_shelx_estimated_absorpt_t_min   0.974
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All N(H) groups
2.a Secondary CH2 refined with riding coordinates:
 C9(H9A,H9B)
2.b Aromatic/amide H refined with riding coordinates:
 N1(H1), N2(H2), C25(H25), C24(H24), C5(H5), C6(H6), C17(H17), C18(H18),
 C19(H19), C20(H20), C8(H8), C27(H27), C26(H26)
;
_smtbx_masks_void_probe_radius   1.2
_smtbx_masks_void_truncation_radius 1.2
_shelx_res_checksum              69004
_shelx_fab_checksum              75451
_olex2_submission_special_instructions 'No special instructions were received'