Lewis acid-catalyzed intramolecular cyclization of 7-alkynylcycloheptatrienes with carbonyls: access to 3,4-disubstituted 2,5-dihydropyrroles
Huang, Xiang; Yang, Jin-Ming; Chemical Communications 61 (2025) 9686–9689; doi:10.1039/D5CC01837D

data_7134589
_publ_section_title
;
 Lewis acid-catalyzed intramolecular cyclization of
 7-alkynylcycloheptatrienes with carbonyls: access to 3,4-disubstituted
 2,5-dihydropyrroles
;
_journal_issue                   53
_journal_name_full               'Chemical Communications'
_journal_page_first              9686
_journal_page_last               9689
_journal_paper_doi               10.1039/D5CC01837D
_journal_volume                  61
_journal_year                    2025
_chemical_formula_moiety         'C25 H23 N O3 S'
_chemical_formula_sum            'C25 H23 N O3 S'
_chemical_formula_weight         417.50
_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     direct
_audit_creation_date             2024-07-06
_audit_creation_method
;
Olex2 1.5-beta
(compiled 2022.04.07 svn.rca3783a0 for OlexSys, GUI svn.r6439)
;
_audit_update_record
;
2025-01-03 deposited with the CCDC.	2025-05-23 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 99.9330(10)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   13.6274(4)
_cell_length_b                   13.9439(4)
_cell_length_c                   22.4596(7)
_cell_measurement_reflns_used    9967
_cell_measurement_temperature    100.00
_cell_measurement_theta_max      68.270
_cell_measurement_theta_min      3.747
_cell_volume                     4203.8(2)
_computing_cell_refinement       'SAINT V8.40B (?, 2016)'
_computing_data_reduction        'SAINT V8.40B (?, 2016)'
_computing_molecular_graphics    'Olex2 1.5-beta (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5-beta (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXS  (Sheldrick, 2008)'
_diffrn_ambient_temperature      100.00
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  Bruker
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0448
_diffrn_reflns_av_unetI/netI     0.0268
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            62383
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         68.256
_diffrn_reflns_theta_min         3.292
_diffrn_source_current           1.0
_diffrn_source_power             0.05
_diffrn_source_voltage           50.0
_exptl_absorpt_coefficient_mu    1.583
_exptl_absorpt_correction_T_max  0.7531
_exptl_absorpt_correction_T_min  0.6600
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1003 before and 0.0650 after correction.
The Ratio of minimum to maximum transmission is 0.8764.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.319
_exptl_crystal_description       block
_exptl_crystal_F_000             1760
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.437
_refine_diff_density_min         -0.554
_refine_diff_density_rms         0.062
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.171
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     543
_refine_ls_number_reflns         7655
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.171
_refine_ls_R_factor_all          0.0556
_refine_ls_R_factor_gt           0.0506
_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^)+(0.0553P)^2^+4.1201P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1311
_refine_ls_wR_factor_ref         0.1334
_reflns_Friedel_coverage         0.000
_reflns_number_gt                6671
_reflns_number_total             7655
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5cc01837d2.cif
_cod_data_source_block           6_148
_cod_depositor_comments
'Adding full bibliography for 7134588--7134589.cif.'
_cod_database_code               7134589
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.833
_shelx_estimated_absorpt_t_min   0.786
_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 Secondary CH2 refined with riding coordinates:
 C7(H7A,H7B), C11(H11A,H11B), C18(H18A,H18B), C32(H32A,H32B), C35(H35A,H35B),
 C37(H37A,H37B)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C5(H5), C6(H6), C13(H13), C14(H14), C15(H15),
 C16(H16), C17(H17), C20(H20), C21(H21), C23(H23), C24(H24), C26(H26), C27(H27),
  C28(H28), C29(H29), C30(H30), C39(H39), C40(H40), C41(H41), C42(H42),
 C43(H43), C45(H45), C46(H46), C48(H48), C49(H49)
2.c Idealised Me refined as rotating group:
 C25(H25A,H25B,H25C), C50(H50A,H50B,H50C)
;
_shelx_res_checksum              10015
_shelx_hkl_checksum              72692
_olex2_submission_special_instructions 'No special instructions were received'