Substrate Control in Enantioselective and Diastereoselective Aldol Reaction by Memory of Chirality: A Rapid Access to Enantiopure β-Hydroxy Quaternary α-Amino Acids.
Viswambharan, Baby; Gori, Didier; Guillot, Régis; Kouklovsky, Cyrille; Alezra, Valérie; Organic letters 16 (2014) 788–791; doi:10.1021/ol403523e

data_1513459
_publ_section_title
;
 Substrate Control in Enantioselective and Diastereoselective Aldol
 Reaction by Memory of Chirality: A Rapid Access to Enantiopure \b-Hydroxy
 Quaternary \a-Amino Acids.
;
_journal_issue                   3
_journal_name_full               'Organic letters'
_journal_page_first              788
_journal_page_last               791
_journal_paper_doi               10.1021/ol403523e
_journal_volume                  16
_journal_year                    2014
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C22 H21 N O5'
_chemical_formula_sum            'C22 H21 N O5'
_chemical_formula_weight         379.40
_space_group_IT_number           18
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      18
_symmetry_space_group_name_Hall  'P 2 2ab'
_symmetry_space_group_name_H-M   'P 21 21 2'
_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                   8.3847(2)
_cell_length_b                   26.3518(9)
_cell_length_c                   8.3634(3)
_cell_measurement_reflns_used    9874
_cell_measurement_temperature    100(1)
_cell_measurement_theta_max      36.84
_cell_measurement_theta_min      2.44
_cell_volume                     1847.91(10)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(1)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.852
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0270
_diffrn_reflns_av_sigmaI/netI    0.0254
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       43
_diffrn_reflns_limit_k_min       -42
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            37892
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         37.36
_diffrn_reflns_theta_min         2.44
_diffrn_source                   'fine-focus sealed tube'
_diffrn_source_type              'kappa X8 APEX II Bruker ICMMO'
_exptl_absorpt_coefficient_mu    0.097
_exptl_absorpt_correction_T_max  0.9837
_exptl_absorpt_correction_T_min  0.9705
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.364
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             800
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.456
_refine_diff_density_min         -0.206
_refine_diff_density_rms         0.050
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.5(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     257
_refine_ls_number_reflns         8189
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0391
_refine_ls_R_factor_gt           0.0353
_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^)+(0.0514P)^2^+0.2097P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0881
_refine_ls_wR_factor_ref         0.0903
_reflns_number_gt                7653
_reflns_number_total             8189
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol403523e_si_001.cif
_cod_data_source_block           11b
_cod_database_code               1513459