FeCl3-Promoted Annulation of 2-haloindoles: Switchable Synthesis of Spirooxindole-chromeno[2,3-b]indoles and Spirooxindole-chromeno[3,2-b]indoles.
Luo, Mupeng; Zhu, Xinlei; Liu, Rufeng; Yu, Shunming; Wei, Wanguo; The Journal of organic chemistry  (2020) –; doi:10.1021/acs.joc.9b03300

data_4037954
_publ_section_title
;
 FeCl3-Promoted Annulation of 2-haloindoles: Switchable Synthesis of
 Spirooxindole-chromeno[2,3-b]indoles and
 Spirooxindole-chromeno[3,2-b]indoles.
;
_journal_name_full               'The Journal of organic chemistry'
_journal_paper_doi               10.1021/acs.joc.9b03300
_journal_year                    2020
_chemical_formula_sum            'C27 H22 N2 O4 S'
_chemical_formula_weight         470.52
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   12.4500(13)
_cell_length_b                   17.1118(19)
_cell_length_c                   20.259(2)
_cell_measurement_reflns_used    4608
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      50.291
_cell_measurement_theta_min      4.511
_cell_volume                     4316.0(8)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0430
_diffrn_reflns_av_unetI/netI     0.0288
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            23513
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.500
_diffrn_reflns_theta_min         2.011
_exptl_absorpt_coefficient_mu    0.190
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6371
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.448
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             1968
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.170
_exptl_crystal_size_min          0.130
_refine_diff_density_max         0.328
_refine_diff_density_min         -0.248
_refine_diff_density_rms         0.051
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.095
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     309
_refine_ls_number_reflns         4022
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.095
_refine_ls_R_factor_all          0.0596
_refine_ls_R_factor_gt           0.0490
_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^)+(0.0606P)^2^+1.6469P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1171
_refine_ls_wR_factor_ref         0.1239
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3344
_reflns_number_total             4022
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo9b03300_si_004.cif
_cod_data_source_block           cd17320
_cod_database_code               4037954
_shelx_estimated_absorpt_t_min   0.963
_shelx_estimated_absorpt_t_max   0.976
_shelxl_version_number           2013-4
_shelx_res_checksum              62903
_shelx_hkl_checksum              33642