Double lawton SN2'addition to epoxyvinyl sulfones: selective construction of the stereotetrads of aplyronine A.
El-Awa, Ahmad; Fuchs, Philip; Organic letters 8 (2006) 2905–2908; doi:10.1021/ol060530l

data_1505959
_publ_section_title
;
 Double lawton SN2'addition to epoxyvinyl sulfones: selective construction
 of the stereotetrads of aplyronine A.
;
_journal_issue                   14
_journal_name_full               'Organic letters'
_journal_page_first              2905
_journal_page_last               2908
_journal_paper_doi               10.1021/ol060530l
_journal_volume                  8
_journal_year                    2006
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C27 H48 O4 S1 Si2'
_chemical_formula_sum            'C27 H48 O4 S Si2'
_chemical_formula_weight         524.92
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_type_scat_source
'International Tables for Crystallography (Vol C)'
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.3367(8)
_cell_length_b                   10.7685(7)
_cell_length_c                   28.627(2)
_cell_measurement_reflns_used    9579
_cell_measurement_temperature    150
_cell_measurement_theta_max      25
_cell_measurement_theta_min      2
_cell_volume                     3186.5(4)
_computing_cell_refinement       DENZO/SCALEPACK_(Otwinowski,_1996)
_computing_data_collection       Collect_(Nonius,_1998)
_computing_data_reduction        DENZO/SCALEPACK_(Otwinowski,_1996)
_computing_molecular_graphics
;
    ORTEP (Johnson, 1976)
    PLATON (Spek, 1997)
;
_computing_structure_refinement  SHELX97_(Sheldrick,_1997)
_computing_structure_solution    Direct_methods_(SIR2002,_Burla_et_al.,_2003)
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.9894
_diffrn_measured_fraction_theta_max 0.9618
_diffrn_measurement_device_type  Nonius_KappaCCD
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  'graphite 002'
_diffrn_radiation_type           MO-K\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.095
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            9579
_diffrn_reflns_theta_full        23.3
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         2.09
_exptl_absorpt_coefficient_mu    0.196
_exptl_absorpt_correction_T_max  0.9663
_exptl_absorpt_correction_T_min  0.9221
_exptl_absorpt_correction_type   multi-scan_(Otwinowski_&_Minor,_1997)
_exptl_crystal_colour_lustre     metallic
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.094
_exptl_crystal_description       plate
_exptl_crystal_F_000             1144
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.71
_refine_diff_density_min         -0.35
_refine_ls_abs_structure_details 'Flack H. D. (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.3(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.095
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     319
_refine_ls_number_reflns         2928
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.112
_refine_ls_R_factor_gt           0.097
_refine_ls_shift/su_max          0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'1/[\s^2^(Fo^2^)+(0.0448P)^2^+13.5183P] where P=(Fo^2^+2Fc^2^)/3 '
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.205
_refine_ls_wR_factor_ref         0.216
_reflns_Friedel_coverage         0.8432
_reflns_number_gt                2542
_reflns_number_total             5318
_reflns_threshold_expression     >2.0\s(I)
_cod_data_source_file            ol060530lrom20060303_101006.cif
_cod_data_source_block           3462
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc ' changed to 'calc'
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_formula_sum        'C27 H48 O4 S1 Si2'
_cod_database_code               1505959