Gold-catalyzed [4+3]- and [4+2]-annulations of 3-en-1-ynamides with isoxazoles <i>via</i> novel 6π-electrocyclizations of 3-azahepta trienyl cations.
Giri, Sovan Sundar; Liu, Rai-Shung; Chemical science 9 (2018) 2991–2995; doi:10.1039/c8sc00232k

data_1548944
_publ_section_title
;
 Gold-catalyzed [4+3]- and [4+2]-annulations of 3-en-1-ynamides with
 isoxazoles <i>via</i> novel 6\p-electrocyclizations of 3-azahepta trienyl
 cations.
;
_journal_issue                   11
_journal_name_full               'Chemical science'
_journal_page_first              2991
_journal_page_last               2995
_journal_paper_doi               10.1039/c8sc00232k
_journal_volume                  9
_journal_year                    2018
_chemical_formula_moiety         'C28 H26 N2 O3 S'
_chemical_formula_sum            'C28 H26 N2 O3 S'
_chemical_formula_weight         470.57
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_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_creation_method           SHELXL-97
_audit_update_record
;
2017-12-06 deposited with the CCDC.
2018-02-19 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 104.4910(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.9904(6)
_cell_length_b                   8.4064(3)
_cell_length_c                   21.3600(9)
_cell_measurement_reflns_used    9890
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      25.004
_cell_measurement_theta_min      2.615
_cell_volume                     2432.21(17)
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'D8 Venture'
_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  0.0544
_diffrn_reflns_av_sigmaI/netI    0.0263
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            39822
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.62
_exptl_absorpt_coefficient_mu    0.166
_exptl_absorpt_correction_T_max  0.9885
_exptl_absorpt_correction_T_min  0.9043
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.285
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             992
_exptl_crystal_size_max          0.62
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.138
_refine_diff_density_min         -0.330
_refine_diff_density_rms         0.040
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     310
_refine_ls_number_reflns         4281
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0610
_refine_ls_R_factor_gt           0.0398
_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^)+(0.0494P)^2^+0.9247P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0960
_refine_ls_wR_factor_ref         0.1141
_reflns_number_gt                3231
_reflns_number_total             4281
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c8sc00232k2.cif
_cod_data_source_block           d19363
_cod_depositor_comments
'Adding full bibliography for 1548943--1548948.cif.'
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1548944