Efficient construction of spirocyclopentane-1,3-dioxindoles <i>via</i> an annulation reaction of isocyanides and 3-methyleneoxindoles.
Huang, Li; Ma, Wei-Qing; Sun, Jing; Han, Ying; Yan, Chao-Guo; Organic & biomolecular chemistry 23 (2025) 3224–3230; doi:10.1039/d5ob00206k

data_7160475
_publ_section_title
;
 Efficient construction of spirocyclopentane-1,3-dioxindoles <i>via</i> an
 annulation reaction of isocyanides and 3-methyleneoxindoles.
;
_journal_issue                   13
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              3224
_journal_page_last               3230
_journal_paper_doi               10.1039/d5ob00206k
_journal_volume                  23
_journal_year                    2025
_chemical_formula_moiety         'C55 H47 F2 N3 O4'
_chemical_formula_sum            'C55 H47 F2 N3 O4'
_chemical_formula_weight         851.95
_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
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2024-11-29 deposited with the CCDC.	2025-03-03 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 93.259(5)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.951(3)
_cell_length_b                   16.772(3)
_cell_length_c                   20.222(4)
_cell_measurement_reflns_used    4334
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      20.46
_cell_measurement_theta_min      2.35
_cell_volume                     5062.6(17)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1935
_diffrn_reflns_av_unetI/netI     0.2056
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            48071
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        24.999
_diffrn_reflns_theta_max         24.999
_diffrn_reflns_theta_min         1.578
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6644
_exptl_absorpt_correction_type   multi-scan'
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.118
_exptl_crystal_description       block
_exptl_crystal_F_000             1792
_exptl_crystal_size_max          0.280
_exptl_crystal_size_mid          0.220
_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.374
_refine_diff_density_min         -0.234
_refine_diff_density_rms         0.052
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.926
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     579
_refine_ls_number_reflns         8903
_refine_ls_number_restraints     48
_refine_ls_restrained_S_all      0.933
_refine_ls_R_factor_all          0.2767
_refine_ls_R_factor_gt           0.0977
_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^)+(0.1412P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2327
_refine_ls_wR_factor_ref         0.2800
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3118
_reflns_number_total             8903
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5ob00206k2.cif
_cod_data_source_block           3f
_cod_original_cell_volume        5062.7(16)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7160475
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.979
_shelx_estimated_absorpt_t_max   0.985
_shelx_res_checksum              28061
_shelx_fab_checksum              24594