Preparation and rearrangement of N-vinyl nitrones: synthesis of spiroisoxazolines and fluorene-tethered isoxazoles.
Mo, Dong-Liang; Wink, Donald A.; Anderson, Laura L.; Organic letters 14 (2012) 5180–5183; doi:10.1021/ol3022885

data_1508668
_publ_section_title
;
 Preparation and rearrangement of N-vinyl nitrones: synthesis of
 spiroisoxazolines and fluorene-tethered isoxazoles.
;
_journal_issue                   20
_journal_name_full               'Organic letters'
_journal_page_first              5180
_journal_page_last               5183
_journal_paper_doi               10.1021/ol3022885
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         'C21 H19 N O3'
_chemical_formula_sum            'C21 H19 N O3'
_chemical_formula_weight         333.37
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_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_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 98.4540(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.1767(7)
_cell_length_b                   13.3547(7)
_cell_length_c                   10.3670(6)
_cell_measurement_temperature    296(2)
_cell_volume                     1667.52(16)
_computing_cell_refinement       'SAINT (Bruker)'
_computing_data_collection       'SMART (Bruker)'
_computing_data_reduction        'SAINT (Bruker)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.940
_diffrn_measured_fraction_theta_max 0.940
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0407
_diffrn_reflns_av_sigmaI/netI    0.0272
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            15148
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         1.69
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.328
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.564
_refine_diff_density_min         -0.345
_refine_diff_density_rms         0.080
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.081
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     226
_refine_ls_number_reflns         3881
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.081
_refine_ls_R_factor_all          0.0669
_refine_ls_R_factor_gt           0.0548
_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^)+(0.0912P)^2^+0.2552P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1575
_refine_ls_wR_factor_ref         0.1679
_reflns_number_gt                2977
_reflns_number_total             3881
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol3022885_si_002.cif
_cod_data_source_block           compound3g
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1508668