Study of a tandem aldol–Tischtschenko reaction between chiral enolsilanes and aldehydes catalyzed by titanium(IV) isopropoxide
Delas, Christophe; Blacque, Olivier; Moïse, Claude; Journal of the Chemical Society, Perkin Transactions 1  (2000) 2265–; doi:10.1039/b002008g

data_7213315
_publ_section_title
;
 Study of a tandem aldol--Tischtschenko reaction between chiral
 enolsilanes and aldehydes catalyzed by titanium(IV) isopropoxide
;
_journal_issue                   14
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 1'
_journal_page_first              2265
_journal_paper_doi               10.1039/b002008g
_journal_year                    2000
_chemical_formula_moiety         'C12 H26 O3'
_chemical_formula_sum            'C12 H26 O3'
_chemical_formula_weight         218.33
_chemical_name_systematic
; 
 (3SR,4SR,5SR,6RS,7RS)-2,4,6-trimethyl-nonane-3,5,7-triol 
;
_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_method           SHELXL-97
_cell_angle_alpha                71.339(5)
_cell_angle_beta                 78.603(8)
_cell_angle_gamma                81.054(5)
_cell_formula_units_Z            2
_cell_length_a                   7.347(1)
_cell_length_b                   7.874(1)
_cell_length_c                   12.715(1)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      26.3
_cell_measurement_theta_min      2.1
_cell_volume                     679.77(14)
_computing_cell_refinement       'CAD4 EXPRESS'
_computing_data_collection       'CAD4 EXPRESS'
_computing_data_reduction        'XCAD4 (Harms, 1996)'
_computing_molecular_graphics    ORTEP3
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(1)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Enraf Nonius CAD4'
_diffrn_measurement_method       Omega-scans
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0136
_diffrn_reflns_av_sigmaI/netI    0.0192
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            2962
_diffrn_reflns_theta_full        26.30
_diffrn_reflns_theta_max         26.30
_diffrn_reflns_theta_min         2.74
_diffrn_standards_decay_%        1
_diffrn_standards_interval_time  120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.074
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.067
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             244
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.162
_refine_diff_density_min         -0.167
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
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_refine_ls_number_reflns         2754
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0664
_refine_ls_R_factor_gt           0.0453
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0765P)^2^+0.0718P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1235
_refine_ls_wR_factor_ref         0.1371
_reflns_number_gt                2046
_reflns_number_total             2754
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b002008gsup1.cif
_cod_data_source_block           compound22
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0765P)^2^+0.0718P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0765P)^2^+0.0718P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        679.7(1)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7213315