Lewis acid-catalyzed [4 + 2] cycloaddition of donor–acceptor cyclobutanes with iminooxindoles: access to spiro[piperidine-3,2′-oxindoles]
Chen, Zuliang; Yan, Keyi; Luo, Hui; Yan, Jun; Zeng, Yang; RSC Advances 12 (2022) 32097–32101; doi:10.1039/D2RA04730F

data_7245804
_publ_section_title
;
 Lewis acid-catalyzed [4 + 2] cycloaddition of donor--acceptor
 cyclobutanes with iminooxindoles: access to
 spiro[piperidine-3,2&#x2032;-oxindoles]
;
_journal_issue                   49
_journal_name_full               'RSC Advances'
_journal_page_first              32097
_journal_page_last               32101
_journal_paper_doi               10.1039/D2RA04730F
_journal_volume                  12
_journal_year                    2022
_chemical_formula_moiety         'C29 H28 N2 O6'
_chemical_formula_sum            'C29 H28 N2 O6'
_chemical_formula_weight         500.53
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_block_doi                 10.5517/ccdc.csd.cc29ys46
_audit_creation_date             2021-04-29
_audit_creation_method
;
Olex2 1.3-alpha
(compiled 2020.09.11 svn.r3730fd0d for OlexSys, GUI svn.r6159)
;
_audit_update_record
;
2022-01-22 deposited with the CCDC.	2022-10-27 downloaded from the CCDC.
;
_cell_angle_alpha                108.892(4)
_cell_angle_beta                 90.756(4)
_cell_angle_gamma                111.651(4)
_cell_formula_units_Z            2
_cell_length_a                   9.3636(4)
_cell_length_b                   11.4375(5)
_cell_length_c                   13.7029(6)
_cell_measurement_reflns_used    4271
_cell_measurement_temperature    150.00(10)
_cell_measurement_theta_max      28.9950
_cell_measurement_theta_min      2.9870
_cell_volume                     1275.75(11)
_computing_cell_refinement       'CrysAlisPro 1.171.38.43f (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.43f (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.43f (Rigaku OD, 2015)'
_computing_molecular_graphics    'Olex2 1.3-alpha (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3-alpha (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT  (Sheldrick, 2015)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      150.00(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 5.2684
_diffrn_detector_type            AtlasS2
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
  1  \w     40.00  65.00   1.00    5.00    --  -11.27  77.00 -60.00   25
  2  \w      0.00  88.00   1.00    5.00    --   11.90  77.00 -30.00   88
  3  \w    -21.00  83.00   1.00    5.00    --   11.90  77.00 120.00  104
  4  \w    -30.00  -3.00   1.00    5.00    --  -11.27  77.00 -60.00   27
  5  \w    -42.00  58.00   1.00    5.00    --  -11.27  77.00-150.00  100
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, AtlasS2'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      -0.0750727000
_diffrn_orient_matrix_UB_12      -0.0389827000
_diffrn_orient_matrix_UB_13      0.0074004000
_diffrn_orient_matrix_UB_21      0.0322228000
_diffrn_orient_matrix_UB_22      0.0017120000
_diffrn_orient_matrix_UB_23      0.0478308000
_diffrn_orient_matrix_UB_31      -0.0110807000
_diffrn_orient_matrix_UB_32      0.0597130000
_diffrn_orient_matrix_UB_33      0.0268386000
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0269
_diffrn_reflns_av_unetI/netI     0.0419
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            9987
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        24.997
_diffrn_reflns_theta_max         24.997
_diffrn_reflns_theta_min         2.048
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.42401
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.43f (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.303
_exptl_crystal_description       block
_exptl_crystal_F_000             528
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.236
_refine_diff_density_min         -0.220
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     337
_refine_ls_number_reflns         4489
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0544
_refine_ls_R_factor_gt           0.0429
_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^)+(0.0394P)^2^+0.4204P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0944
_refine_ls_wR_factor_ref         0.1018
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3683
_reflns_number_total             4489
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2ra04730f2.cif
_cod_data_source_block           3-8
_cod_database_code               7245804
_shelx_shelxl_version_number     2018/3
_reflns_odcompleteness_completeness 99.94
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     26.32
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C7(H7)
2.b Secondary CH2 refined with riding coordinates:
 C8(H8A,H8B), C9(H9A,H9B)
2.c Aromatic/amide H refined with riding coordinates:
 N2(H2), C2(H2A), C3(H3), C5(H5), C6(H6), C15(H15), C16(H16), C17(H17),
 C18(H18), C20(H20), C21(H21), C22(H22), C23(H23), C24(H24)
2.d Idealised Me refined as rotating group:
 C26(H26A,H26B,H26C), C28(H28A,H28B,H28C), C29(H29A,H29B,H29C)
;
_smtbx_masks_void_probe_radius   1.2
_smtbx_masks_void_truncation_radius 1.2
_shelx_res_checksum              41779
_shelx_fab_checksum              5740
_olex2_date_sample_data_collection 2021-04-29
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 2.978
_oxdiff_exptl_absorpt_empirical_full_min 0.718