Brønsted acid ionic liquid catalyzed facile synthesis of 3-vinylindoles through direct C3 alkenylation of indoles with simple ketones
Taheri, Amir; Liu, Changhui; Lai, Bingbing; Cheng, Cheng; Pan, Xiaojuan; Gu, Yanlong; Green Chemistry 16 (2014) 3715–; doi:10.1039/C4GC00840E

data_7217611
_publ_section_title
;
 Br\/onsted acid ionic liquid catalyzed facile synthesis of 3-vinylindoles
 through direct C3 alkenylation of indoles with simple ketones
;
_journal_issue                   8
_journal_name_full               'Green Chemistry'
_journal_page_first              3715
_journal_paper_doi               10.1039/C4GC00840E
_journal_volume                  16
_journal_year                    2014
_chemical_formula_sum            'C20 H19 N'
_chemical_formula_weight         273.36
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           4
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 92.401(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.859(4)
_cell_length_b                   7.981(4)
_cell_length_c                   23.406(12)
_cell_measurement_temperature    296(2)
_cell_volume                     1466.8(13)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.865
_diffrn_measured_fraction_theta_max 0.865
_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  0.0378
_diffrn_reflns_av_sigmaI/netI    0.0757
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            9507
_diffrn_reflns_theta_full        31.11
_diffrn_reflns_theta_max         31.11
_diffrn_reflns_theta_min         1.74
_exptl_absorpt_coefficient_mu    0.071
_exptl_absorpt_correction_T_max  0.9817
_exptl_absorpt_correction_T_min  0.9789
_exptl_crystal_density_diffrn    1.238
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             584
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.26
_refine_diff_density_max         0.723
_refine_diff_density_min         -0.552
_refine_diff_density_rms         0.177
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(10)
_refine_ls_extinction_coef       0.24(5)
_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   1.000
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     384
_refine_ls_number_reflns         6654
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.1756
_refine_ls_R_factor_gt           0.1541
_refine_ls_shift/su_max          0.071
_refine_ls_shift/su_mean         0.017
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.4800P)^2^+0.7512P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.4980
_refine_ls_wR_factor_ref         0.5295
_reflns_number_gt                4730
_reflns_number_total             6654
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             7216185
_cod_data_source_file            c4gc00840e2.cif
_cod_data_source_block           1
_cod_database_code               7217611