Preparation of Novel Unsymmetrical Bisindoles under Solvent-Free Conditions: Synthesis, Crystal Structures, and Mechanistic Aspects
Hanns Martin Kaiser; Ivo Zenz; Wei Fun Lo; Anke Spannenberg; Kristin Schröder; Haijun Jiao; Dirk Gördes; Matthias Beller; Man Kin Tse; Journal of Organic Chemistry 72 (2007) 8847–8858; doi:10.1021/jo7016026

data_4023049
_publ_section_title
;
 Preparation of Novel Unsymmetrical Bisindoles under Solvent-Free
 Conditions: Synthesis, Crystal Structures, and Mechanistic Aspects
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              8847
_journal_page_last               8858
_journal_paper_doi               10.1021/jo7016026
_journal_volume                  72
_journal_year                    2007
_chemical_formula_sum            'C29 H33 N3 O7 S'
_chemical_formula_weight         567.64
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 99.372(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.5642(6)
_cell_length_b                   27.4004(19)
_cell_length_c                   11.5292(6)
_cell_measurement_reflns_used    all
_cell_measurement_temperature    293(2)
_cell_volume                     2981.0(3)
_computing_data_collection       STOE-X-AREA
_computing_molecular_graphics    XP
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR2004 (J. Appl. Cryst. 2005, 38, 381)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'STOE-IPDS II'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0710
_diffrn_reflns_av_sigmaI/netI    0.0560
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       -32
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            38552
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.49
_exptl_absorpt_coefficient_mu    0.157
_exptl_absorpt_correction_T_max  0.6678
_exptl_absorpt_correction_T_min  0.4006
_exptl_absorpt_correction_type   numerical
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.265
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1200
_exptl_crystal_size_max          0.75
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.608
_refine_diff_density_min         -0.479
_refine_diff_density_rms         0.048
_refine_ls_extinction_coef       0.0120(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.917
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     358
_refine_ls_number_reflns         5265
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      0.922
_refine_ls_R_factor_all          0.0871
_refine_ls_R_factor_gt           0.0532
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0932P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1415
_refine_ls_wR_factor_ref         0.1517
_reflns_number_gt                3039
_reflns_number_total             5265
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo7016026-File002.cif
_cod_data_source_block           ks480w
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4023049