A new class of substituted aryl bis(oxazoline) ligands for highly enantioselective copper-catalyzed asymmetric aldol addition of dienolsilane to pyruvate and glyoxylate esters.
Le, Julie Cong-Dung; Pagenkopf, Brian L.; Organic letters 6 (2004) 4097–4099; doi:10.1021/ol048179w

data_1506948
_publ_section_title
;
 A new class of substituted aryl bis(oxazoline) ligands for highly
 enantioselective copper-catalyzed asymmetric aldol addition of
 dienolsilane to pyruvate and glyoxylate esters.
;
_journal_issue                   22
_journal_name_full               'Organic letters'
_journal_page_first              4097
_journal_page_last               4099
_journal_paper_doi               10.1021/ol048179w
_journal_volume                  6
_journal_year                    2004
_chemical_formula_sum            'C16 H18 O6'
_chemical_formula_weight         306.30
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_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                 113.233(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.8086(7)
_cell_length_b                   8.4239(6)
_cell_length_c                   11.2036(10)
_cell_measurement_temperature    153(2)
_cell_volume                     763.92(11)
_computing_cell_refinement       'Collect software, Nonius B.V. 1998'
_computing_data_collection       'Collect software, Nonius B.V. 1998'
_computing_data_reduction
;
DENZO and Scalepack (Otwinoski and Minor, 1997)
;
_computing_molecular_graphics    'XP SHELXTL/PC, Siemens Analytical'
_computing_structure_refinement  'XL SHELXTL/PC, Siemens Analytical'
_computing_structure_solution
;

SIR97 - Altomare A., Burla M.C., Camalli M., Cascarano G.L., Giacovazzo C., 
Guagliardi A., Moliterni A.G.G., Polidori G.,Spagna R.
;
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.907
_diffrn_measured_fraction_theta_max 0.907
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       \w-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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0546
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            3035
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         3.12
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.332
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prisms
_exptl_crystal_F_000             324
_exptl_crystal_size_max          0.56
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.281
_refine_diff_density_min         -0.244
_refine_diff_density_rms         0.057
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.6(16)
_refine_ls_extinction_coef       0.047(8)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.327
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     272
_refine_ls_number_reflns         3035
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.326
_refine_ls_R_factor_all          0.0800
_refine_ls_R_factor_gt           0.0766
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0000P)^2^+0.8820P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1357
_refine_ls_wR_factor_ref         0.1373
_reflns_number_gt                2918
_reflns_number_total             3035
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol048179wsi20040908_095154.cif
_cod_data_source_block           22jl17
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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_sg_symbol_H-M      P21
_cod_database_code               1506948