Use of Elemental Sulfur or Selenium in a Novel One-Pot Copper-Catalyzed Tandem Cyclization of Functionalized Ynamides Leading to Benzosultams.
Siva Reddy, Alla; Kumara Swamy, K. C.; Organic letters 17 (2015) 2996–2999; doi:10.1021/acs.orglett.5b01287

data_1520447
_publ_section_title
;
 Use of Elemental Sulfur or Selenium in a Novel One-Pot Copper-Catalyzed
 Tandem Cyclization of Functionalized Ynamides Leading to Benzosultams.
;
_journal_issue                   12
_journal_name_full               'Organic letters'
_journal_page_first              2996
_journal_page_last               2999
_journal_paper_doi               10.1021/acs.orglett.5b01287
_journal_volume                  17
_journal_year                    2015
_chemical_formula_sum            'C16 H14 F N O2 S2'
_chemical_formula_weight         335.40
_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_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 92.391(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.7817(19)
_cell_length_b                   13.0488(12)
_cell_length_c                   7.2719(7)
_cell_measurement_reflns_used    1933
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.6530
_cell_measurement_theta_min      4.0530
_cell_volume                     1496.2(3)
_computing_cell_refinement       'CrysAlisPro, Oxford Diffraction Ltd.'
_computing_data_collection       'CrysAlisPro, Oxford Diffraction Ltd.'
_computing_data_reduction        'CrysAlisPro, Oxford Diffraction Ltd.'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 'ACTA 50'
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Xcalibur, Eos, Gemini'
_diffrn_measurement_method       '\w scans'
_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  0.0393
_diffrn_reflns_av_sigmaI/netI    0.0580
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            5676
_diffrn_reflns_theta_full        'ACTA 50'
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         3.02
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count 'not applicable'
_diffrn_standards_interval_time  'not applicable'
_diffrn_standards_number         'not applicable'
_exptl_absorpt_coefficient_mu    0.372
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.75453
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlisPro, Oxford Diffraction Ltd.'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.489
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.14
_refine_diff_density_max         1.464
_refine_diff_density_min         -0.507
_refine_diff_density_rms         0.145
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.172
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     201
_refine_ls_number_reflns         2638
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.172
_refine_ls_R_factor_all          0.1406
_refine_ls_R_factor_gt           0.1243
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1051P)^2^+18.9833P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3279
_refine_ls_wR_factor_ref         0.3357
_reflns_number_gt                2092
_reflns_number_total             2638
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol5b01287_si_002.cif
_cod_data_source_block           compound-2g
_cod_depositor_comments
'Adding full bibliography for 1520446--1520450.cif.'
_cod_database_code               1520447