Acidic-functionalized ionic liquid as an efficient, green and reusable catalyst for hetero-Michael addition of nitrogen, sulfur and oxygen nucleophiles to α,β-unsaturated ketones.
Han, Feng; Yang, Lei; Li, Zhen; Xia, Chungu; Organic & biomolecular chemistry 10 (2012) 346–354; doi:10.1039/c1ob06346d

data_7152133
_publ_section_title
;
 Acidic-functionalized ionic liquid as an efficient, green and reusable
 catalyst for hetero-Michael addition of nitrogen, sulfur and oxygen
 nucleophiles to \a,\b-unsaturated ketones.
;
_journal_issue                   2
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              346
_journal_page_last               354
_journal_paper_doi               10.1039/c1ob06346d
_journal_volume                  10
_journal_year                    2012
_chemical_formula_sum            'C17 H16 N4 O'
_chemical_formula_weight         292.34
_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                 106.802(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.203(2)
_cell_length_b                   13.362(5)
_cell_length_c                   18.973(7)
_cell_measurement_temperature    296(2)
_cell_volume                     1505.4(9)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART APEX II'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.970
_diffrn_measured_fraction_theta_max 0.970
_diffrn_measurement_device_type  'Bruker APEX II area detector'
_diffrn_measurement_method       '\w scan'
_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  0.0821
_diffrn_reflns_av_sigmaI/netI    0.0811
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            9338
_diffrn_reflns_theta_full        25.07
_diffrn_reflns_theta_max         25.07
_diffrn_reflns_theta_min         1.89
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.9793
_exptl_absorpt_correction_T_min  0.9752
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.290
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             616
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.245
_refine_diff_density_min         -0.264
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     200
_refine_ls_number_reflns         2599
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0882
_refine_ls_R_factor_gt           0.0590
_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^)+(0.0858P)^2^+0.1795P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1615
_refine_ls_wR_factor_ref         0.1850
_reflns_number_gt                1745
_reflns_number_total             2599
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1ob06346d.txt
_cod_data_source_block           1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P2(1)/c '
_cod_database_code               7152133