Organocatalysed multicomponent synthesis of pyrazolidinones: Meldrum's acid approach
Etienne Pair; Christophe Berini; Romain Noel; Morgane Sanselme; Vincent Levacher; Jean-Francois Briere; Chem.Commun. 50 (2014) 10218–; doi:10.1039/C4cc04852k

data_7115541
_publ_section_title
;
 Organocatalysed multicomponent synthesis of pyrazolidinones: Meldrum's
 acid approach
;
_journal_name_full               Chem.Commun.
_journal_page_first              10218
_journal_paper_doi               10.1039/C4cc04852k
_journal_volume                  50
_journal_year                    2014
_chemical_absolute_configuration unk
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C16 H20 N2 O2'
_chemical_formula_sum            'C16 H20 N2 O2'
_chemical_formula_weight         272.34
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_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_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4
_audit_creation_date             2014-02-27T10:35:48-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 100.888(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   6.1563(13)
_cell_length_b                   8.2068(17)
_cell_length_c                   14.895(3)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_measurement_wavelength     0.71073
_cell_volume                     739.0(3)
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0203
_diffrn_reflns_av_unetI/netI     0.0351
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            5755
_diffrn_reflns_theta_full        26.38
_diffrn_reflns_theta_max         26.38
_diffrn_reflns_theta_min         2.79
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.224
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             292
_exptl_crystal_size_max          0
_exptl_crystal_size_mid          0
_exptl_crystal_size_min          0
_refine_diff_density_max         0.549
_refine_diff_density_min         -0.144
_refine_diff_density_rms         0.04
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.325
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     183
_refine_ls_number_reflns         2952
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.324
_refine_ls_R_factor_all          0.0743
_refine_ls_R_factor_gt           0.0561
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0544P)^2^+0.0274P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1288
_refine_ls_wR_factor_ref         0.1345
_reflns_number_gt                2264
_reflns_number_total             2952
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c4cc04852k2.cif
_cod_data_source_block           ep305
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7115541