Preparation of tetrasubstituted furans via intramolecular Wittig reactions with phosphorus ylides as intermediates.
Kao, Tzu-Ting; Syu, Siang-en; Jhang, Yi-Wun; Lin, Wenwei; Organic letters 12 (2010) 3066–3069; doi:10.1021/ol101080q

data_1503046
_publ_section_title
;
 Preparation of tetrasubstituted furans via intramolecular Wittig
 reactions with phosphorus ylides as intermediates.
;
_journal_issue                   13
_journal_name_full               'Organic letters'
_journal_page_first              3066
_journal_page_last               3069
_journal_paper_doi               10.1021/ol101080q
_journal_volume                  12
_journal_year                    2010
_chemical_formula_moiety         'C28 H38 N O P'
_chemical_formula_sum            'C28 H38 N O P'
_chemical_formula_weight         435.56
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 100.9240(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.0677(3)
_cell_length_b                   13.0609(3)
_cell_length_c                   15.1264(5)
_cell_measurement_reflns_used    11585
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      25.028
_cell_measurement_theta_min      2.037
_cell_volume                     2534.93(12)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction        'HKL Denzo and Scalepack'
_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_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'CCD rotation images, thick slices'
_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  0.0821
_diffrn_reflns_av_sigmaI/netI    0.0844
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            16773
_diffrn_reflns_theta_full        25.04
_diffrn_reflns_theta_max         25.04
_diffrn_reflns_theta_min         2.08
_exptl_absorpt_coefficient_mu    0.127
_exptl_absorpt_correction_T_max  1.0917
_exptl_absorpt_correction_T_min  0.8785
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 ?
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.141
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             944
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.260
_refine_diff_density_min         -0.438
_refine_diff_density_rms         0.075
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    fixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     280
_refine_ls_number_reflns         4472
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.1147
_refine_ls_R_factor_gt           0.0614
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0754P)^2^+0.8903P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1367
_refine_ls_wR_factor_ref         0.1685
_reflns_number_gt                2865
_reflns_number_total             4472
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol101080q_si_005.cif
_cod_data_source_block           10540
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               1503046