An efficient synthetic route to carbocyclic enaminonitriles via Lewis acid catalysed domino-ring-opening-cyclisation (DROC) of donor-acceptor cyclopropanes with malononitrile
Manas K. Ghorai; Ranadeep Talukdar; Deo Prakash Tiwari; Chem.Commun. 49 (2013) 8205–; doi:10.1039/c3cc44533j

data_7109723
_publ_section_title
;
 An efficient synthetic route to carbocyclic enaminonitriles via Lewis
 acid catalysed domino-ring-opening-cyclisation (DROC) of donor-acceptor
 cyclopropanes with malononitrile
;
_journal_name_full               Chem.Commun.
_journal_page_first              8205
_journal_paper_doi               10.1039/c3cc44533j
_journal_volume                  49
_journal_year                    2013
_chemical_formula_moiety         'C16 H16 N2 O4'
_chemical_formula_sum            'C16 H16 N2 O4'
_chemical_formula_weight         300.31
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                96.580(2)
_cell_angle_beta                 101.994(2)
_cell_angle_gamma                100.214(2)
_cell_formula_units_Z            2
_cell_length_a                   7.9815(8)
_cell_length_b                   9.9504(10)
_cell_length_c                   10.0645(10)
_cell_measurement_temperature    293(2)
_cell_volume                     759.89(13)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.975
_diffrn_measured_fraction_theta_max 0.975
_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  0.0190
_diffrn_reflns_av_sigmaI/netI    0.0385
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            3962
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         4.19
_exptl_absorpt_coefficient_mu    0.096
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.56258
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.312
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             316
_exptl_crystal_size_max          0.008
_exptl_crystal_size_mid          0.006
_exptl_crystal_size_min          0.002
_refine_diff_density_max         0.269
_refine_diff_density_min         -0.263
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     201
_refine_ls_number_reflns         2615
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0572
_refine_ls_R_factor_gt           0.0470
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0703P)^2^+0.3827P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1192
_refine_ls_wR_factor_ref         0.1344
_reflns_number_gt                2175
_reflns_number_total             2615
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3cc44533j.txt
_cod_data_source_block           3a
_cod_database_code               7109723