Preparation of 3-Diazoindolin-2-imines via Cascade Reaction between Indoles and Sulfonylazides and Their Extensions to 2,3-Diaminoindoles and Imidazo[4,5-b]indoles.
Sheng, Guorong; Huang, Kai; Chi, Zhihao; Ding, Hualong; Xing, Yanpeng; Lu, Ping; Wang, Yanguang; Organic letters 16 (2014) 5096–5099; doi:10.1021/ol502423k

data_1517932
_publ_section_title
;
 Preparation of 3-Diazoindolin-2-imines via Cascade Reaction between
 Indoles and Sulfonylazides and Their Extensions to 2,3-Diaminoindoles and
 Imidazo[4,5-b]indoles.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              5096
_journal_page_last               5099
_journal_paper_doi               10.1021/ol502423k
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         'C16 H15 N3 O4 S'
_chemical_formula_sum            'C16 H15 N3 O4 S'
_chemical_formula_weight         345.37
_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                 110.08(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.501(2)
_cell_length_b                   10.7195(15)
_cell_length_c                   15.234(3)
_cell_measurement_reflns_used    2920
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.2334
_cell_measurement_theta_min      3.4169
_cell_volume                     1610.6(5)
_computing_cell_refinement       'CrysAlis PRO (Agilent Technologies, 2011)'
_computing_data_collection       'CrysAlis PRO'
_computing_data_reduction        'CrysAlis PRO'
_computing_molecular_graphics    'OLEX2 (Dolomanov et al., 2009)'
_computing_publication_material  OLEX2
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 10.3592
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Xcalibur, Atlas, Gemini ultra'
_diffrn_measurement_method       '\w scans'
_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  0.1246
_diffrn_reflns_av_sigmaI/netI    0.0909
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            9531
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         3.42
_exptl_absorpt_coefficient_mu    0.227
_exptl_absorpt_correction_T_max  0.9392
_exptl_absorpt_correction_T_min  0.9248
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlis PRO (Agilent Technologies, 2011) 
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.424
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             720
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.28
_refine_diff_density_max         1.064
_refine_diff_density_min         -0.677
_refine_diff_density_rms         0.208
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.491
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     219
_refine_ls_number_reflns         2946
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.491
_refine_ls_R_factor_all          0.1734
_refine_ls_R_factor_gt           0.1435
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3836
_refine_ls_wR_factor_ref         0.4056
_reflns_number_gt                2080
_reflns_number_total             2946
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol502423k_si_004.cif
_cod_data_source_block           140327_sgr2_068
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1517932