Zn/Sc bimetallic relay catalysis: one pot cycloisomerization/carbonyl-ene reaction toward oxazole derivatives.
Wang, Bin; Chen, Ying; Zhou, Ling; Wang, Jianwu; Xu, Zhenghu; Organic & biomolecular chemistry 14 (2016) 826–829; doi:10.1039/c5ob02158h

data_7154806
_publ_section_title
;
 Zn/Sc bimetallic relay catalysis: one pot cycloisomerization/carbonyl-ene
 reaction toward oxazole derivatives.
;
_journal_issue                   3
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              826
_journal_page_last               829
_journal_paper_doi               10.1039/c5ob02158h
_journal_volume                  14
_journal_year                    2016
_chemical_formula_sum            'C17 H14 N2 O4'
_chemical_formula_weight         310.30
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2015-10-14 deposited with the CCDC.
2015-11-17 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   12.9877(3)
_cell_length_b                   7.4549(2)
_cell_length_c                   31.4842(9)
_cell_measurement_temperature    298(2)
_cell_volume                     3048.36(14)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'bruker Apex II'
_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  0.0275
_diffrn_reflns_av_sigmaI/netI    0.0259
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -37
_diffrn_reflns_number            17171
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.03
_exptl_absorpt_coefficient_mu    0.098
_exptl_absorpt_correction_T_max  0.9932
_exptl_absorpt_correction_T_min  0.9912
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.352
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1296
_exptl_crystal_size_max          0.09
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.869
_refine_diff_density_min         -0.271
_refine_diff_density_rms         0.067
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.054
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         2679
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.054
_refine_ls_R_factor_all          0.1119
_refine_ls_R_factor_gt           0.0892
_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^)+(0.1281P)^2^+5.9330P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2516
_refine_ls_wR_factor_ref         0.2703
_reflns_number_gt                2003
_reflns_number_total             2679
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5ob02158h2.cif
_cod_data_source_block           p
_cod_depositor_comments          'Adding full bibliography for 7154806.cif.'
_cod_database_code               7154806