Enantiopure 2-substituted glyceraldehyde derivatives by aza-Claisen rearrangement or C-alkylation of enamines.
Bridgwood, Katy L.; Tzschucke, C. Christoph; O'Brien, Matthew; Wittrock, Sven; Goodman, Jonathan M.; Davies, John E.; Logan, Angus W. J.; Hüttl, Matthias R M; Ley, Steven V.; Organic letters 10 (2008) 4537–4540; doi:10.1021/ol8018242

data_1504902
_publ_section_title
;
 Enantiopure 2-substituted glyceraldehyde derivatives by aza-Claisen
 rearrangement or C-alkylation of enamines.
;
_journal_issue                   20
_journal_name_full               'Organic letters'
_journal_page_first              4537
_journal_page_last               4540
_journal_paper_doi               10.1021/ol8018242
_journal_volume                  10
_journal_year                    2008
_chemical_absolute_configuration
;
 1098 Friedel pairs were averaged for the refinement
;
_chemical_formula_moiety         'C16 H22 O5'
_chemical_formula_sum            'C16 H22 O5'
_chemical_formula_weight         294.34
_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                   6.1878(2)
_cell_length_b                   10.3959(3)
_cell_length_c                   24.2681(7)
_cell_measurement_reflns_used    11499
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      25.03
_cell_measurement_theta_min      1.00
_cell_volume                     1561.11(8)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius B.V. 1998)'
_computing_data_reduction
;
 HKL Denzo and Scalepack (Otwinowski & Minor 1997)
;
_computing_publication_material  'SHELXL-97 (Sheldrick 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick 1997)'
_computing_structure_solution    'SIR-92 (Altomare et al. 1994)'
_diffrn_ambient_temperature      180(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       'Thin slice \w and \f scans'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0496
_diffrn_reflns_av_sigmaI/netI    0.0330
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            7618
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         3.70
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.999
_exptl_absorpt_correction_T_min  0.625
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
multi-scan from symmetry-related measurements 
 Sortav (Blessing 1995)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.252
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             632
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.139
_refine_diff_density_min         -0.156
_refine_diff_density_rms         0.033
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.6(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.079
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     194
_refine_ls_number_reflns         1616
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.079
_refine_ls_R_factor_all          0.0419
_refine_ls_R_factor_gt           0.0338
_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^)+(0.0340P)^2^+0.2902P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0758
_refine_ls_wR_factor_ref         0.0808
_reflns_number_gt                1435
_reflns_number_total             1616
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol8018242_si_004.cif
_cod_data_source_block           sl0819
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1504902