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_4024609
_publ_section_title
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Catalytic, One-Pot Synthesis of \b-Amino Acids from \a-Amino Acids.
Preparation of \a,\b-Peptide Derivatives
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_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         'C26 H34 N2 O4'
_chemical_formula_sum            'C26 H34 N2 O4'
_chemical_formula_weight         438.55
_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            8
_cell_length_a                   11.7111(2)
_cell_length_b                   11.7978(2)
_cell_length_c                   37.5941(7)
_cell_measurement_reflns_used    9987
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      20.90
_cell_measurement_theta_min      2.37
_cell_volume                     5194.20(16)
_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      298(2)
_diffrn_detector_area_resol_mean 8.26
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_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  0.0317
_diffrn_reflns_av_sigmaI/netI    0.0751
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       44
_diffrn_reflns_limit_l_min       -53
_diffrn_reflns_number            55277
_diffrn_reflns_theta_full        30.57
_diffrn_reflns_theta_max         30.57
_diffrn_reflns_theta_min         2.17
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  0.9821
_exptl_absorpt_correction_T_min  0.9633
_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    1.122
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1888
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.304
_refine_diff_density_min         -0.196
_refine_diff_density_rms         0.039
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.993
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           fullcycle
_refine_ls_number_parameters     589
_refine_ls_number_reflns         8645
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      0.993
_refine_ls_R_factor_all          0.1556
_refine_ls_R_factor_gt           0.0542
_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^)+(0.0898P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1279
_refine_ls_wR_factor_ref         0.1490
_reflns_number_gt                3660
_reflns_number_total             8645
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo9004487_si_008.cif
_cod_data_source_block           96
_cod_depositor_comments
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The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 
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_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               4024609