Carbon Acid Induced Mukaiyama Aldol Type Reaction of Sterically Hindered Ketones
Hikaru Yanai; Yasuhiro Yoshino; Arata Takahashi; Takeo Taguchi; Journal of Organic Chemistry 75 (2010) 5375–5378; doi:10.1021/jo100915e

data_4025556
_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@toyaku.ac.jp
_publ_contact_author_name        'Hikaru Yanai'
_publ_section_title
;
 Carbon Acid Induced Mukaiyama Aldol Type Reaction of Sterically Hindered
 Ketones
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              5375
_journal_page_last               5378
_journal_paper_doi               10.1021/jo100915e
_journal_volume                  75
_journal_year                    2010
_chemical_formula_moiety         'C18 H32 O3 Si'
_chemical_formula_sum            'C18 H32 O3 Si'
_chemical_formula_weight         324.53
_chemical_melting_point          80.8
_chemical_name_systematic
; 
(R*)-5-((R*)-1-(tert-Butyldimethylsilyloxy)-2,2-dimethylcyclohexyl)
furan-2(5H)-one 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             '29 September 09'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                99.615(2)
_cell_angle_beta                 91.836(2)
_cell_angle_gamma                96.734(2)
_cell_formula_units_Z            2
_cell_length_a                   7.5776(12)
_cell_length_b                   10.1746(16)
_cell_length_c                   12.161(2)
_cell_measurement_reflns_used    4735
_cell_measurement_temperature    296
_cell_measurement_theta_max      27.55
_cell_measurement_theta_min      2.43
_cell_volume                     916.8(3)
_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      296
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.978
_diffrn_measured_fraction_theta_max 0.978
_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  0.0256
_diffrn_reflns_av_sigmaI/netI    0.0297
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            10472
_diffrn_reflns_theta_full        27.55
_diffrn_reflns_theta_max         27.55
_diffrn_reflns_theta_min         1.70
_exptl_absorpt_coefficient_mu    0.138
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
;
Crystal Faces plugin in Bruker APEX2 software
;
_exptl_crystal_colour            BLOCK
_exptl_crystal_density_diffrn    1.176
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       COLORLESS
_exptl_crystal_F_000             356
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.458
_refine_diff_density_min         -0.206
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     206
_refine_ls_number_reflns         4139
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0442
_refine_ls_R_factor_gt           0.0356
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0482P)^2^+0.3273P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0900
_refine_ls_wR_factor_ref         0.0952
_reflns_number_gt                3531
_reflns_number_total             4139
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo100915e_si_002.cif
_cod_data_source_block           3d-Si
_cod_original_sg_symbol_Hall     '-P 1 '
_cod_original_sg_symbol_H-M      'P -1 '
_cod_database_code               4025556