Intramolecular Methylation of an Allyl Sulfone via Lithium Alkoxyaluminate; Application to the Enantioselective Synthesis of the CD Ring of Vitamin D(3).
Sikervar, Vikas; Fuchs, Philip L.; Organic letters 14 (2012) 2922–2924; doi:10.1021/ol301144a

data_1507746
_publ_section_title
;
 Intramolecular Methylation of an Allyl Sulfone via Lithium
 Alkoxyaluminate; Application to the Enantioselective Synthesis of the CD
 Ring of Vitamin D(3).
;
_journal_issue                   11
_journal_name_full               'Organic letters'
_journal_page_first              2922
_journal_page_last               2924
_journal_paper_doi               10.1021/ol301144a
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         'C28 H42 O4 S3 Si1'
_chemical_formula_sum            'C28 H42 O4 S3 Si'
_chemical_formula_weight         566.92
_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'
_cell_angle_alpha                90.00
_cell_angle_beta                 106.159(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.5036(4)
_cell_length_b                   23.9728(11)
_cell_length_c                   12.1982(7)
_cell_measurement_reflns_used    31251
_cell_measurement_temperature    150.00(2)
_cell_measurement_theta_max      70
_cell_measurement_theta_min      2
_cell_volume                     2950.2(2)
_computing_cell_refinement       'DENZO/SCALEPACK (Otwinowski & Minor, 1996)'
_computing_data_collection       'Collect (Nonius, 1998)'
_computing_data_reduction        'EVALCCD (Duisenberg, 2003)'
_computing_molecular_graphics
;
    ORTEP (Johnson, 1976)
    PLATON (Spek, 2003)
;
_computing_publication_material  'SHELX97(Sheldrick, 2008) and local programs'
_computing_structure_refinement  'SHELX97 (Sheldrick, 2008)'
_computing_structure_solution
;
 Direct methods (SIR2004, Burla et al., 2005)
;
_diffrn_ambient_temperature      150.00(2)
_diffrn_measured_fraction_theta_full 0.9570
_diffrn_measured_fraction_theta_max 0.9570
_diffrn_measurement_device_type  Nonius_KappaCCD
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  'graphite 002'
_diffrn_radiation_type           CU-K\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0650
_diffrn_reflns_av_sigmaI/netI    0.0242
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            31251
_diffrn_reflns_theta_full        60.0
_diffrn_reflns_theta_max         70.14
_diffrn_reflns_theta_min         1.84
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.934
_exptl_absorpt_correction_T_max  0.7032
_exptl_absorpt_correction_T_min  0.5217
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.276
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1216
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.12
_refine_diff_density_max         1.15
_refine_diff_density_min         -0.40
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     332
_refine_ls_number_reflns         5363
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.064
_refine_ls_R_factor_gt           0.062
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'1/[\s^2^(Fo^2^)+(0.1046P)^2^+2.5704P] where P=(Fo^2^+2Fc^2^)/3  '
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.173
_refine_ls_wR_factor_ref         0.176
_reflns_number_gt                4994
_reflns_number_total             5363
_reflns_threshold_expression     >2.0\s(I)
_cod_data_source_file            ol301144a_si_002.cif
_cod_data_source_block           CDKET
_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        'C28 H42 O4 S3 Si1'
_cod_database_code               1507746