Stereoselective total synthesis of (±)-fragranol by TiCl4 promoted [2+2] cycloaddition of allyl-tert-butyldiphenylsilane and methyl methacrylate†
Knölker, Hans-Joachim; Schmitt, Oliver; Wanzl, Günter; Baum, Gerhard; Chemical Communications  (1999) 1737–; doi:10.1039/a905019a

data_7115246
_publ_section_title
;
 Stereoselective total synthesis of (+-)-fragranol by TiCl4 promoted [2+2]
 cycloaddition of allyl-tert-butyldiphenylsilane and methyl
 methacrylate&#x2020;
;
_journal_issue                   17
_journal_name_full               'Chemical Communications'
_journal_page_first              1737
_journal_paper_doi               10.1039/a905019a
_journal_year                    1999
_chemical_formula_sum            'C24 H32 O2 Si'
_chemical_formula_weight         380.59
_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_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_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                   7.900(3)
_cell_length_b                   14.751(5)
_cell_length_c                   18.956(6)
_cell_measurement_temperature    200(2)
_cell_volume                     2209.0(13)
_computing_cell_refinement       'STOE IPDS software'
_computing_data_collection       'STOE IPDS software'
_computing_data_reduction        'STOE IPDS software'
_computing_molecular_graphics    'SCHAKAL-97 (Keller Freiburg 1997'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Area detector (IPDS, STOE)'
_diffrn_measurement_method       'Image plate'
_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  0.0912
_diffrn_reflns_av_sigmaI/netI    0.0715
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            10267
_diffrn_reflns_theta_full        25.82
_diffrn_reflns_theta_max         25.82
_diffrn_reflns_theta_min         2.55
_exptl_absorpt_coefficient_mu    0.121
_exptl_crystal_density_diffrn    1.144
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             824
_refine_diff_density_max         0.570
_refine_diff_density_min         -0.511
_refine_diff_density_rms         0.064
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.10(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     249
_refine_ls_number_reflns         4228
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.059
_refine_ls_R_factor_all          0.0552
_refine_ls_R_factor_gt           0.0523
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0974P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1392
_refine_ls_wR_factor_ref         0.1421
_reflns_number_gt                3964
_reflns_number_total             4228
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            905019a.txt
_cod_data_source_block           anti-5
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0974P)^2^+0.0000P] 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^)+(0.0974P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               7115246