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_1548948
_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         'C16 H18 N2 O3 S'
_chemical_formula_sum            'C16 H18 N2 O3 S'
_chemical_formula_weight         318.38
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 94.047(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
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_cell_length_b                   9.6096(9)
_cell_length_c                   29.660(3)
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_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      21.58
_cell_measurement_theta_min      2.75
_cell_volume                     3124.6(5)
_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 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Bruker APEX2'
_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  0.0562
_diffrn_reflns_av_sigmaI/netI    0.0815
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_number            8336
_diffrn_reflns_theta_full        25.24
_diffrn_reflns_theta_max         25.24
_diffrn_reflns_theta_min         1.38
_exptl_absorpt_coefficient_mu    0.221
_exptl_absorpt_correction_T_max  0.9912
_exptl_absorpt_correction_T_min  0.9782
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.354
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1344
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.355
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_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
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_refine_ls_number_reflns         2790
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.011
_refine_ls_R_factor_all          0.1146
_refine_ls_R_factor_gt           0.0592
_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^)+(0.0682P)^2^+3.3752P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1393
_refine_ls_wR_factor_ref         0.1623
_reflns_number_gt                1656
_reflns_number_total             2790
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c8sc00232k2.cif
_cod_data_source_block           ch19381
_cod_depositor_comments
'Adding full bibliography for 1548943--1548948.cif.'
_cod_original_cell_volume        3124.5(5)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               1548948