Stereoselective synthesis of donor-acceptor substituted cyclopropafuranones by intramolecular cyclopropanation of vinylogous carbonates: divergent synthesis of tetrahydrofuran-3-one, tetrahydropyran-3-one, and lactones.
Gharpure, Santosh J.; Shukla, Manoj K.; Vijayasree, U.; Organic letters 11 (2009) 5466–5469; doi:10.1021/ol902301h

data_1504288
_publ_section_title
;
 Stereoselective synthesis of donor-acceptor substituted
 cyclopropafuranones by intramolecular cyclopropanation of vinylogous
 carbonates: divergent synthesis of tetrahydrofuran-3-one,
 tetrahydropyran-3-one, and lactones.
;
_journal_issue                   23
_journal_name_full               'Organic letters'
_journal_page_first              5466
_journal_page_last               5469
_journal_paper_doi               10.1021/ol902301h
_journal_volume                  11
_journal_year                    2009
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C15 H16 O4'
_chemical_formula_sum            'C15 H16 O4'
_chemical_formula_weight         260.28
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 93.115(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   5.0129(2)
_cell_length_b                   8.5049(3)
_cell_length_c                   15.8364(6)
_cell_measurement_reflns_used    4079
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      28.32
_cell_measurement_theta_min      2.56
_cell_volume                     674.17(4)
_computing_cell_refinement       'APEX II,Bruker,2004'
_computing_data_collection       'APEX II,Bruker,2004'
_computing_data_reduction        SAINT,Bruker,2004
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.974
_diffrn_measurement_device_type  'Bruker Apex II 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  0.0284
_diffrn_reflns_av_sigmaI/netI    0.0315
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            9005
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.39
_diffrn_reflns_theta_min         2.58
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0.9890
_exptl_absorpt_correction_T_min  0.9808
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 1999)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.282
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       flakes
_exptl_crystal_F_000             276
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.147
_refine_diff_density_min         -0.195
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.5(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         2977
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0408
_refine_ls_R_factor_gt           0.0329
_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^)+(0.0350P)^2^+0.0660P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0697
_refine_ls_wR_factor_ref         0.0734
_reflns_number_gt                2618
_reflns_number_total             2977
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol902301h_si_004.cif
_cod_data_source_block           36a
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1504288