A stereoselective cyclization to carbafuranose derivatives starting from 1,4-bis-epoxides.
Leung, Leo M. H.; Boydell, A. James; Gibson, Vicky; Light, Mark E.; Linclau, Bruno; Organic letters 7 (2005) 5183–5186; doi:10.1021/ol052009h

data_1506734
_publ_section_title
;
 A stereoselective cyclization to carbafuranose derivatives starting from
 1,4-bis-epoxides.
;
_journal_issue                   23
_journal_name_full               'Organic letters'
_journal_page_first              5183
_journal_page_last               5186
_journal_paper_doi               10.1021/ol052009h
_journal_volume                  7
_journal_year                    2005
_chemical_absolute_configuration ad
_chemical_formula_sum            'C41 H50 O3 S2 Si'
_chemical_formula_weight         683.02
_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                 112.75(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.791(5)
_cell_length_b                   11.2002(17)
_cell_length_c                   14.029(4)
_cell_measurement_reflns_used    4471
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     1853.5(10)
_computing_cell_refinement
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_data_collection       'COLLECT (Hooft, R.W.W., 1998)'
_computing_data_reduction
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_molecular_graphics    'CAMERON (Watkin, et al., 1993)'
_computing_publication_material  'WINGX (Farrugia, 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker-Nonius CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans to fill the asymmetric unit'
_diffrn_radiation_monochromator  '10cm confocal mirrors'
_diffrn_radiation_source         'Bruker Nonius FR591 Rotating Anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1296
_diffrn_reflns_av_sigmaI/netI    0.1795
_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       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            27463
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.15
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.213
_exptl_absorpt_correction_T_max  0.9958
_exptl_absorpt_correction_T_min  0.9708
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS V2.10 (Sheldrick, G.M., 2003)
;
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.224
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Rod
_exptl_crystal_F_000             732
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.306
_refine_diff_density_min         -0.322
_refine_diff_density_rms         0.075
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.09(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.997
_refine_ls_hydrogen_treatment    refU
_refine_ls_matrix_type           full
_refine_ls_number_parameters     474
_refine_ls_number_reflns         8377
_refine_ls_number_restraints     523
_refine_ls_restrained_S_all      0.985
_refine_ls_R_factor_all          0.1453
_refine_ls_R_factor_gt           0.0663
_refine_ls_shift/su_max          0.079
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0350P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1067
_refine_ls_wR_factor_ref         0.1293
_reflns_number_gt                4751
_reflns_number_total             8377
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol052009hsi20050819_030710.cif
_cod_data_source_block           12BETA
_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 'refu' changed to
'refU' 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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1853.4(9)
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1506734