Phosphine-catalyzed enantioselective and diastereodivergent [3+2] cyclization for the construction of oxetane dispirooxindole skeletons.
Han, Xiao; Hou, Jie; Zhang, Haiyan; Wang, Zhen; Yao, Weijun; Chemical communications (Cambridge, England) 60 (2024) 10736–10739; doi:10.1039/d4cc03610g

data_7133665
_publ_section_title
;
 Phosphine-catalyzed enantioselective and diastereodivergent [3+2]
 cyclization for the construction of oxetane dispirooxindole skeletons.
;
_journal_issue                   77
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              10736
_journal_page_last               10739
_journal_paper_doi               10.1039/d4cc03610g
_journal_volume                  60
_journal_year                    2024
_chemical_absolute_configuration rmad
_chemical_formula_sum            'C28 H30 N O6'
_chemical_formula_weight         476.53
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2016/6
_audit_update_record
;
2024-06-10 deposited with the CCDC.	2024-09-02 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.8531(5)
_cell_length_b                   8.9782(6)
_cell_length_c                   35.617(2)
_cell_measurement_reflns_used    9413
_cell_measurement_temperature    170(2)
_cell_measurement_theta_max      69.46
_cell_measurement_theta_min      2.48
_cell_volume                     2511.2(3)
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      170(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.979
_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  0.0825
_diffrn_reflns_av_unetI/netI     0.0545
_diffrn_reflns_Laue_measured_fraction_full 0.995
_diffrn_reflns_Laue_measured_fraction_max 0.979
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       43
_diffrn_reflns_limit_l_min       -43
_diffrn_reflns_number            27527
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.975
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         70.086
_diffrn_reflns_theta_min         2.481
_exptl_absorpt_coefficient_mu    0.722
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.260
_exptl_crystal_description       block
_exptl_crystal_F_000             1012
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.320
_refine_diff_density_min         -0.360
_refine_diff_density_rms         0.084
_refine_ls_abs_structure_details
;
 Flack x determined using 1587 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.17(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.188
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     319
_refine_ls_number_reflns         4661
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.188
_refine_ls_R_factor_all          0.0883
_refine_ls_R_factor_gt           0.0852
_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^)+(0.2300P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2854
_refine_ls_wR_factor_ref         0.2937
_reflns_Friedel_coverage         0.723
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.970
_reflns_number_gt                4385
_reflns_number_total             4661
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4cc03610g2.cif
_cod_data_source_block           cu_220628_hj3_110132_0m_a
_cod_depositor_comments
'Adding full bibliography for 7133664--7133666.cif.'
_cod_database_code               7133665
_shelx_shelxl_version_number     2016/6
_shelx_res_checksum              5312
_shelx_hkl_checksum              67063