Catalytic, One-Pot Synthesis of β-Amino Acids from α-Amino Acids. Preparation of α,β-Peptide Derivatives
Carlos Saavedra; Rosendo Hernández; Alicia Boto; Eleuterio Álvarez; Journal of Organic Chemistry 74 (2009) 4655–4665; doi:10.1021/jo9004487

data_4024607
_publ_section_title
;
Catalytic, One-Pot Synthesis of \b-Amino Acids from \a-Amino Acids.
Preparation of \a,\b-Peptide Derivatives
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              4655
_journal_page_last               4665
_journal_paper_doi               10.1021/jo9004487
_journal_volume                  74
_journal_year                    2009
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C29 H32 N2 O4'
_chemical_formula_sum            'C29 H32 N2 O4'
_chemical_formula_weight         472.57
_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                 108.4120(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   15.304(2)
_cell_length_b                   5.7408(7)
_cell_length_c                   15.6163(19)
_cell_measurement_reflns_used    5728
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      24.06
_cell_measurement_theta_min      2.70
_cell_volume                     1301.7(3)
_computing_cell_refinement       'Bruker (2006). APEX 2. Version 2.1.'
_computing_data_collection       'Bruker (2006). APEX 2. Version 2.1.'
_computing_data_reduction        'Bruker (2006). APEX 2. Version 2.1.'
_computing_molecular_graphics    'XP, SHELXTL v. 6.14 (Bruker, 2003)'
_computing_publication_material  'XCIF, SHELXTL v. 6.14 (Bruker, 2003)'
_computing_structure_refinement  'XL, SHELXTL v. 6.14 (Bruker, 2003)'
_computing_structure_solution    'Bruker (2006). APEX 2. Version 2.1.'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 8.26
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type
; 
 Bruker-Nonius X8kappa APEX II CCD area detector' 
;
_diffrn_measurement_method       'phi and omega scans with narrow frames'
_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  0.0350
_diffrn_reflns_av_sigmaI/netI    0.0176
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            22707
_diffrn_reflns_theta_full        26.29
_diffrn_reflns_theta_max         26.29
_diffrn_reflns_theta_min         1.62
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.9857
_exptl_absorpt_correction_T_min  0.9709
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
 SADABS, Bruker (2006). APEX 2. Version 2.1. Bruker Analytical 
 X-ray Solutions, Madison, Wisconsin, USA. 
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.206
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             504
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.396
_refine_diff_density_min         -0.219
_refine_diff_density_rms         0.061
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     319
_refine_ls_number_reflns         2901
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0679
_refine_ls_R_factor_gt           0.0576
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1312P)^2^+1.5848P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1543
_refine_ls_wR_factor_ref         0.1655
_reflns_number_gt                2374
_reflns_number_total             2901
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo9004487_si_006.cif
_cod_data_source_block           83
_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_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               4024607