Conjugate hydrotrifluoromethylation of α,β-unsaturated acyl-oxazolidinones: synthesis of chiral fluorinated amino acids.
Erdbrink, Holger; Peuser, Ilona; Gerling, Ulla I. M.; Lentz, Dieter; Koksch, Beate; Czekelius, Constantin; Organic & biomolecular chemistry 10 (2012) 8583–8586; doi:10.1039/c2ob26810h

data_7152746
_publ_section_title
;
 Conjugate hydrotrifluoromethylation of \a,\b-unsaturated
 acyl-oxazolidinones: synthesis of chiral fluorinated amino acids.
;
_journal_issue                   43
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              8583
_journal_page_last               8586
_journal_paper_doi               10.1039/c2ob26810h
_journal_volume                  10
_journal_year                    2012
_chemical_absolute_configuration syn
_chemical_formula_sum            'C21 H27 F3 N2 O5'
_chemical_formula_weight         444.45
_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                   6.3032(14)
_cell_length_b                   17.505(4)
_cell_length_c                   19.677(4)
_cell_measurement_reflns_used    989
_cell_measurement_temperature    133(2)
_cell_measurement_theta_max      30.5
_cell_measurement_theta_min      3.4
_cell_volume                     2171.1(8)
_computing_cell_refinement       'SAINT (BRUKER-AXS)'
_computing_data_collection       'SMART (BRUKER-AXS)'
_computing_data_reduction        'SAINT (BRUKER-AXS)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      133(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'BRUKER-AXS SMART CCD'
_diffrn_measurement_method       'omega scan'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0254
_diffrn_reflns_av_sigmaI/netI    0.0183
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            35355
_diffrn_reflns_theta_full        30.60
_diffrn_reflns_theta_max         30.60
_diffrn_reflns_theta_min         2.07
_exptl_absorpt_coefficient_mu    0.113
_exptl_absorpt_correction_T_max  0.746
_exptl_absorpt_correction_T_min  0.705
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'BRUKER-AXS SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.360
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             936
_exptl_crystal_size_max          0.8
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.270
_refine_diff_density_min         -0.251
_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   -0.1(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.063
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     288
_refine_ls_number_reflns         6616
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.063
_refine_ls_R_factor_all          0.0384
_refine_ls_R_factor_gt           0.0346
_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^)+(0.0524P)^2^+0.2787P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0859
_refine_ls_wR_factor_ref         0.0886
_reflns_number_gt                6156
_reflns_number_total             6616
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ob26810h.txt
_cod_data_source_block           he0112a
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7152746