Diastereoselective Synthesis oftrans-2,3-Dihydrofurans with Pyridinium Ylide Assisted Tandem Reaction
Qi-Fang Wang; Hong Hou; Li Hui; Chao-Guo Yan; Journal of Organic Chemistry 74 (2009) 7403–7406; doi:10.1021/jo901379h

data_4024876
_publ_contact_author_address
;
      College of Chemistry & Chemical Engineering
      Yangzhou University
      Yangzhou 225002, 
      P.R. China
;
_publ_contact_author_email       cgyan@yzu.edu.cn
_publ_contact_author_fax         +86-514-7975590-8401
_publ_contact_author_name        'Chao Guo Yan'
_publ_contact_author_phone       +86-514-7975531
_publ_section_title
;
Diastereoselective Synthesis oftrans-2,3-Dihydrofurans with Pyridinium
Ylide Assisted Tandem Reaction
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              7403
_journal_page_last               7406
_journal_paper_doi               10.1021/jo901379h
_journal_volume                  74
_journal_year                    2009
_chemical_formula_moiety         'C22 H21 N O4'
_chemical_formula_sum            'C22 H21 N O4'
_chemical_formula_weight         363.40
_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                 109.305(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.6450(18)
_cell_length_b                   11.5032(16)
_cell_length_c                   13.9685(19)
_cell_measurement_reflns_used    2999
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      21.7
_cell_measurement_theta_min      2.5
_cell_volume                     1917.6(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0386
_diffrn_reflns_av_sigmaI/netI    0.0377
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            16488
_diffrn_reflns_theta_full        27.54
_diffrn_reflns_theta_max         27.54
_diffrn_reflns_theta_min         1.71
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.9880
_exptl_absorpt_correction_T_min  0.9846
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_density_diffrn    1.259
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             768
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.206
_refine_diff_density_min         -0.225
_refine_diff_density_rms         0.034
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     246
_refine_ls_number_reflns         4395
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0882
_refine_ls_R_factor_gt           0.0482
_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^)+(0.0529P)^2^+0.2391P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1119
_refine_ls_wR_factor_ref         0.1304
_reflns_number_gt                2675
_reflns_number_total             4395
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             4024875
_cod_data_source_file            jo901379h_si_001_2.cif
_cod_data_source_block           wqf090424_0m__1g
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_hydrogen_treatment' value 'CONSTR' changed to
'constr' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4024876