Constructing fused N-heterocycles from unprotected mesoionic N-heterocyclic olefins and organic azides <i>via</i> diazo transfer.
Liang, Qiuming; Hayashi, Kasumi; Zeng, Yimin; Jimenez-Santiago, Jose L; Song, Datong; Chemical communications (Cambridge, England) 57 (2021) 6137–6140; doi:10.1039/d1cc02245h

data_7128334
_publ_section_title
;
 Constructing fused N-heterocycles from unprotected mesoionic
 N-heterocyclic olefins and organic azides <i>via</i> diazo transfer.
;
_journal_issue                   50
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              6137
_journal_page_last               6140
_journal_paper_doi               10.1039/d1cc02245h
_journal_volume                  57
_journal_year                    2021
_chemical_formula_sum            'C20 H23 N3'
_chemical_formula_weight         305.41
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2016/6
_audit_update_record
;
2021-04-08 deposited with the CCDC.	2021-05-19 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 92.972(13)
_cell_angle_gamma                90
_cell_formula_units_Z            2
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_cell_length_b                   7.518(2)
_cell_length_c                   12.116(3)
_cell_measurement_reflns_used    13047
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.525
_cell_measurement_theta_min      3.904
_cell_volume                     860.9(4)
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Bruker Kappa Photon II'
_diffrn_measurement_method       'omega and phi scans'
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_diffrn_reflns_av_R_equivalents  0.0485
_diffrn_reflns_av_unetI/netI     0.0587
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.991
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            13047
_diffrn_reflns_point_group_measured_fraction_full 0.958
_diffrn_reflns_point_group_measured_fraction_max 0.933
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.525
_diffrn_reflns_theta_min         3.904
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6833
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 SADABS 2016/2: Krause, L., Herbst-Irmer, R., Sheldrick G.M. & Stalke D.,
 J. Appl. Cryst. 48 (2015) 3-10
;
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    1.178
_exptl_crystal_description       block
_exptl_crystal_F_000             328
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.132
_refine_diff_density_min         -0.136
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details
;
 Flack x determined using 1025 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.1(10)
_refine_ls_extinction_coef       0.049(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2016/6 (Sheldrick 2016)'
_refine_ls_goodness_of_fit_ref   0.967
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     213
_refine_ls_number_reflns         3709
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.967
_refine_ls_R_factor_all          0.0541
_refine_ls_R_factor_gt           0.0369
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0412P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0785
_refine_ls_wR_factor_ref         0.0822
_reflns_Friedel_coverage         0.750
_reflns_Friedel_fraction_full    0.916
_reflns_Friedel_fraction_max     0.866
_reflns_number_gt                2861
_reflns_number_total             3709
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1cc02245h2.cif
_cod_data_source_block           wl465
_cod_depositor_comments
'Adding full bibliography for 7128333--7128355.cif.'
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7128334
_shelx_shelxl_version_number     2016/6
_shelx_res_checksum              10387
_shelx_hkl_checksum              88889