Highly Effective Vinylogous Mukaiyama-Michael Reaction Catalyzed by Silyl Methide Species Generated from 1,1,3,3-Tetrakis(trifluoromethanesulfonyl)propane
Arata Takahashi; Hikaru Yanai; Min Zhang; Takaaki Sonoda; Masaaki Mishima; Takeo Taguchi; Journal of Organic Chemistry 75 (2010) 1259–1265; doi:10.1021/jo902641g

data_4025254
_publ_contact_author_address
;
School of Pharmacy, Tokyo University of Pharmacy and Life Sciences,
1432-1 Horinouchi Hachioji, Tokyo, 192-0392, Japan
;
_publ_contact_author_email       yanai@ps.toyaku.ac.jp
_publ_contact_author_name        'Hikaru Yanai'
_publ_section_title
;
 Highly Effective Vinylogous Mukaiyama-Michael Reaction Catalyzed by Silyl
 Methide Species Generated from
 1,1,3,3-Tetrakis(trifluoromethanesulfonyl)propane
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              1259
_journal_page_last               1265
_journal_paper_doi               10.1021/jo902641g
_journal_volume                  75
_journal_year                    2010
_chemical_formula_moiety         'C15 H21 Br O3'
_chemical_formula_sum            'C15 H21 Br O3'
_chemical_formula_weight         329.23
_chemical_name_systematic
; 
(S*)-3-bromo-5-((R*)-1-cyclohexyl-3-oxobutyl)-5-methyl-5H-furan-2-one
;
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             '01 April 2009'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   20.354(6)
_cell_length_b                   10.517(3)
_cell_length_c                   7.131(2)
_cell_measurement_reflns_used    7373
_cell_measurement_temperature    90
_cell_measurement_theta_max      27.76
_cell_measurement_theta_min      2.18
_cell_volume                     1526.5(8)
_computing_cell_refinement       'APEX2 (Bruker AXS, 2006)'
_computing_data_collection       'APEX2 (Bruker AXS, 2006)'
_computing_data_reduction        'SAINT (Bruker AXS, 2004)'
_computing_molecular_graphics    'XSHEL (Bruker AXS,2002)'
_computing_publication_material  'XCIF (Bruker AXS, 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      90
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker APEXII CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  'Bruker Helios multilayer confocal mirror'
_diffrn_radiation_source         'Bruker TXS fine-focus rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0386
_diffrn_reflns_av_sigmaI/netI    0.0306
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            16690
_diffrn_reflns_theta_full        27.81
_diffrn_reflns_theta_max         27.81
_diffrn_reflns_theta_min         1.94
_exptl_absorpt_coefficient_mu    2.695
_exptl_absorpt_correction_T_max  0.8770
_exptl_absorpt_correction_T_min  0.5191
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
;
Crystal Faces plugin in Bruker APEX2 software
;
_exptl_crystal_colour            COLORLESS
_exptl_crystal_density_diffrn    1.433
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       PLATE
_exptl_crystal_F_000             680
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.698
_refine_diff_density_min         -0.318
_refine_diff_density_rms         0.061
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.364(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     175
_refine_ls_number_reflns         3579
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0306
_refine_ls_R_factor_gt           0.0259
_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^)+(0.0382P)^2^+0.2087P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0625
_refine_ls_wR_factor_ref         0.0646
_reflns_number_gt                3298
_reflns_number_total             3579
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo902641g_si_007.cif
_cod_data_source_block           anti-3if
_cod_original_cell_volume        1526.3(8)
_cod_original_sg_symbol_Hall     'P 2c -2ac '
_cod_original_sg_symbol_H-M      'P c a 21 '
_cod_database_code               4025254