A facile approach to spirocyclic 2-azido indolines via azidation of indoles with ceric ammonium nitrate.
Li, Jing; Liu, Mao; Li, Qi; Tian, Hua; Shi, Yian; Organic & biomolecular chemistry 12 (2014) 9769–9772; doi:10.1039/c4ob01549e

data_7154187
_publ_section_title
;
 A facile approach to spirocyclic 2-azido indolines via azidation of
 indoles with ceric ammonium nitrate.
;
_journal_issue                   48
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              9769
_journal_page_last               9772
_journal_paper_doi               10.1039/c4ob01549e
_journal_volume                  12
_journal_year                    2014
_chemical_formula_moiety         'C14 H14 N8 O4'
_chemical_formula_sum            'C14 H14 N8 O4'
_chemical_formula_weight         358.33
_chemical_name_systematic        5h
_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                 94.61(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.410(3)
_cell_length_b                   6.5061(13)
_cell_length_c                   18.689(4)
_cell_measurement_reflns_used    5295
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.4832
_cell_measurement_theta_min      1.0931
_cell_volume                     1625.3(6)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2008)'
_computing_molecular_graphics
;
 Mercury: visualization and analysis of crystal structures, C. F. Macrae,
 P. R. Edgington, P. McCabe, E. Pidcock, G. P. Shields, R. Taylor,
 M. Towler and J. van de Streek, J. Appl. Cryst., 39, 453-457, 2006.
;
_computing_publication_material  'SHELX-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELX-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELX-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'MM007HF + CCD (Saturn724+)'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  Confocal
_diffrn_radiation_source         'Rotating Anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0361
_diffrn_reflns_av_sigmaI/netI    0.0296
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            9426
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.19
_exptl_absorpt_coefficient_mu    0.112
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7854
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2008)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.464
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             744
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent: '
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.515
_refine_diff_density_min         -0.470
_refine_diff_density_rms         0.158
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.205
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         2850
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.205
_refine_ls_R_factor_all          0.0634
_refine_ls_R_factor_gt           0.0534
_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^)+(0.1490P)^2^+0.3759P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1803
_refine_ls_wR_factor_ref         0.2237
_reflns_number_gt                2669
_reflns_number_total             2850
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ob01549e2.cif
_cod_data_source_block           a
_cod_depositor_comments
'Adding full bibliography for 7154184--7154188.cif.'
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7154187