The dihydrofuran template approach to furofuran synthesis.
Aldous, David J.; Batsanov, Andrei S.; Yufit, Dmitrii S.; Dalençon, Anne J; Dutton, William M.; Steel, Patrick G.; Organic & biomolecular chemistry 4 (2006) 2912–2927; doi:10.1039/b604952d

data_7151243
_publ_section_title
;
 The dihydrofuran template approach to furofuran synthesis.
;
_journal_issue                   15
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2912
_journal_page_last               2927
_journal_paper_doi               10.1039/b604952d
_journal_volume                  4
_journal_year                    2006
_chemical_formula_moiety         'C19 H19 N O4 S'
_chemical_formula_sum            'C19 H19 N O4 S'
_chemical_formula_weight         357.41
_chemical_name_common
N-toluenesulfonyl-3-methoxycarbonyl-2-phenyl-3-pyrroline
_chemical_name_systematic
' N-toluenesulfonyl-3-methoxycarbonyl-2-phenyl-3-pyrroline'
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                87.502(3)
_cell_angle_beta                 89.201(3)
_cell_angle_gamma                77.553(3)
_cell_formula_units_Z            2
_cell_length_a                   5.8932(4)
_cell_length_b                   9.2189(7)
_cell_length_c                   16.1992(13)
_cell_measurement_reflns_used    1781
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      26.35
_cell_measurement_theta_min      2.25
_cell_volume                     858.57(11)
_computing_cell_refinement       'SMART version 5.054 (Bruker, 1998)'
_computing_data_collection       'SMART version 5.054 (Bruker, 1998)'
_computing_data_reduction        'SAINT version 6.01 (Bruker, 1999)'
_computing_molecular_graphics    'SHELXTL version 5.10 (Bruker, 1997)'
_computing_publication_material  'SHELXTL version 5.10 (Bruker, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      110.0(2)
_diffrn_detector_area_resol_mean 8
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART CCD'
_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  0.0839
_diffrn_reflns_av_sigmaI/netI    0.1039
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            8583
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.26
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.212
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.383
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             376
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.297
_refine_diff_density_min         -0.386
_refine_diff_density_rms         0.075
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.017
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     230
_refine_ls_number_reflns         3371
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.017
_refine_ls_R_factor_all          0.1066
_refine_ls_R_factor_gt           0.0573
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0600P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1204
_refine_ls_wR_factor_ref         0.1355
_reflns_number_gt                2145
_reflns_number_total             3371
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b604952d.txt
_cod_data_source_block           (15)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7151243