Development of methodologies for the regioselective synthesis of four series of regioisomer isoxazoles from β-enamino diketones
Silva, Raí G. M.; da Silva, Michael J. V.; Jacomini, Andrey P.; Moura, Sidnei; Back, Davi F.; Basso, Ernani A.; Rosa, Fernanda A.; RSC Advances 8 (2018) 4773–; doi:10.1039/C7RA13343J

data_7230043
_publ_section_title
;
 Development of methodologies for the regioselective synthesis of four
 series of regioisomer isoxazoles from \b-enamino diketones
;
_journal_issue                   9
_journal_name_full               'RSC Advances'
_journal_page_first              4773
_journal_paper_doi               10.1039/C7RA13343J
_journal_volume                  8
_journal_year                    2018
_chemical_formula_moiety         'C13 H10 N2 O6'
_chemical_formula_sum            'C13 H10 N2 O6'
_chemical_formula_weight         290.23
_chemical_melting_point          ?
_chemical_name_common
'ethyl 2-(5-(4-nitrophenyl)isoxazol-4-yl)-2-ox'
_chemical_name_systematic
;
        ethyl 2-(5-(4-nitrophenyl)isoxazol-4-yl)-2-oxoacetate
;
_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_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.3
_audit_creation_date             2016-02-26T09:53:11-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_audit_update_record
;
2017-12-06 deposited with the CCDC.
2018-01-22 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 106.635(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.6326(13)
_cell_length_b                   14.5578(13)
_cell_length_c                   7.3585(7)
_cell_measurement_reflns_used    9900
_cell_measurement_temperature    297(2)
_cell_measurement_theta_max      24.84
_cell_measurement_theta_min      2.918
_cell_volume                     1296.6(2)
_computing_cell_refinement       'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_data_collection       'Bruker Instrument Service v4.2.7'
_computing_data_reduction        'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_molecular_graphics    'Diamond (version 3.2i; Crystal Impact G'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXL97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      297(2)
_diffrn_detector_area_resol_mean 10.4167
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker D8 Quest Photon 100 diffractometer'
_diffrn_measurement_method       '2\% \f & \w scans'
_diffrn_radiation_monochromator  'Montel type 2-dim beam shaping X ray optics'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0405
_diffrn_reflns_av_unetI/netI     0.0159
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            87599
_diffrn_reflns_theta_full        30.58
_diffrn_reflns_theta_max         30.58
_diffrn_reflns_theta_min         2.19
_diffrn_source                   'micro-focus tube'
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count none
_diffrn_standards_interval_time  none
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    0.12
_exptl_absorpt_correction_T_max  0.9887
_exptl_absorpt_correction_T_min  0.9666
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS (version 2012/1; Bruker, 2012) was used to perform the numerical
        absorption correction based on the indexed faces of the crystal.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.487
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             600
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.343
_refine_diff_density_min         -0.27
_refine_diff_density_rms         0.042
_refine_ls_extinction_coef       none
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.974
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     190
_refine_ls_number_reflns         3988
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.974
_refine_ls_R_factor_all          0.0777
_refine_ls_R_factor_gt           0.0563
_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^)+(0.0964P)^2^+0.4367P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1607
_refine_ls_wR_factor_ref         0.1774
_reflns_number_gt                2971
_reflns_number_total             3988
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7ra13343j2.cif
_cod_data_source_block           p21c
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value 'none' was changed to '?' - the value
is undefined or not given.

'_exptl_crystal_density_meas' value 'none' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 
;
_cod_original_sg_symbol_Hall     -P2ybc
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7230043