Highly substituted 2,3-dihydroisoxazoles by Et(3)N-catalyzed tandem reaction of electron-deficient 1,3-conjugated enynes with hydroxylamines.
Yu, Xiuzhao; Du, Bo; Wang, Kai; Zhang, Junliang; Organic letters 12 (2010) 1876–1879; doi:10.1021/ol100490y

data_1502939
_publ_section_title
;
 Highly substituted 2,3-dihydroisoxazoles by Et(3)N-catalyzed tandem
 reaction of electron-deficient 1,3-conjugated enynes with hydroxylamines.
;
_journal_issue                   8
_journal_name_full               'Organic letters'
_journal_page_first              1876
_journal_page_last               1879
_journal_paper_doi               10.1021/ol100490y
_journal_volume                  12
_journal_year                    2010
_chemical_formula_sum            'C18 H15 N O3'
_chemical_formula_weight         293.31
_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                68.4160(10)
_cell_angle_beta                 73.9990(10)
_cell_angle_gamma                72.3670(10)
_cell_formula_units_Z            2
_cell_length_a                   6.8760(2)
_cell_length_b                   10.0689(3)
_cell_length_c                   11.7443(4)
_cell_measurement_temperature    173(2)
_cell_volume                     708.08(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_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  0.0173
_diffrn_reflns_av_sigmaI/netI    0.0154
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            8201
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         1.90
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9777
_exptl_absorpt_correction_T_min  0.9696
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.376
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             308
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.187
_refine_diff_density_min         -0.222
_refine_diff_density_rms         0.034
_refine_ls_extinction_coef       0.026(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     200
_refine_ls_number_reflns         2468
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0370
_refine_ls_R_factor_gt           0.0342
_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^)+(0.0594P)^2^+0.1790P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1015
_refine_ls_wR_factor_ref         0.1052
_reflns_number_gt                2258
_reflns_number_total             2468
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol100490y_si_004.cif
_cod_data_source_block           z
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1502939