Regiodivergent heterocyclization: a strategy for the synthesis of substituted pyrroles and furans using alpha-formyl ketene dithioacetals as common precursors
Ting Wu; Ling Pan; Xianxiu Xu; Qun Liu; Chem.Commun. 50 (2014) 1797–; doi:10.1039/c3cc48546c

data_7111913
_publ_section_title
;
 Regiodivergent heterocyclization: a strategy for the synthesis of
 substituted pyrroles and furans using alpha-formyl ketene dithioacetals
 as common precursors
;
_journal_name_full               Chem.Commun.
_journal_page_first              1797
_journal_paper_doi               10.1039/c3cc48546c
_journal_volume                  50
_journal_year                    2014
_chemical_formula_moiety         'C19 H16 O4 S2'
_chemical_formula_sum            'C19 H16 O4 S2'
_chemical_formula_weight         372.44
_chemical_name_systematic
;
 ?
;
_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                 107.751(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.510(4)
_cell_length_b                   8.068(3)
_cell_length_c                   17.081(5)
_cell_measurement_reflns_used    3032
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.0
_cell_measurement_theta_min      2.8
_cell_volume                     1773.2(10)
_computing_cell_refinement       CrysAlis
_computing_data_collection       'CrysAlis (Oxford Diffraction, 2006)'
_computing_data_reduction        CrysAlis
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.972
_diffrn_measured_fraction_theta_max 0.972
_diffrn_measurement_device_type  'Oxford Diffraction Gemini R Ultra'
_diffrn_measurement_method       '\w scan'
_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  0.1046
_diffrn_reflns_av_sigmaI/netI    0.2288
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            7945
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.82
_exptl_absorpt_coefficient_mu    0.321
_exptl_absorpt_correction_T_max  0.968
_exptl_absorpt_correction_T_min  0.962
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.395
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.421
_refine_diff_density_min         -0.437
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.863
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     226
_refine_ls_number_reflns         3032
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      0.863
_refine_ls_R_factor_all          0.1312
_refine_ls_R_factor_gt           0.0678
_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^)+(0.0000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1795
_refine_ls_wR_factor_ref         0.2335
_reflns_number_gt                1703
_reflns_number_total             3032
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c3cc48546c.txt
_cod_data_source_block           161b
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7111913