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_4024616
_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 rmad
_chemical_formula_moiety         'C31 H42 I N3 O5'
_chemical_formula_sum            'C31 H42 I N3 O5'
_chemical_formula_weight         663.58
_space_group_IT_number           146
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'R 3'
_symmetry_space_group_name_H-M   'R 3 :H'
_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                120.00
_cell_formula_units_Z            18
_cell_length_a                   44.8052(13)
_cell_length_b                   44.8052(13)
_cell_length_c                   8.8254(4)
_cell_measurement_reflns_used    9923
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      21.20
_cell_measurement_theta_min      2.37
_cell_volume                     15343.4(9)
_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      223(2)
_diffrn_detector_area_resol_mean 8.26
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.0921
_diffrn_reflns_av_sigmaI/netI    0.0503
_diffrn_reflns_limit_h_max       52
_diffrn_reflns_limit_h_min       -56
_diffrn_reflns_limit_k_max       55
_diffrn_reflns_limit_k_min       -55
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            91627
_diffrn_reflns_theta_full        26.45
_diffrn_reflns_theta_max         26.45
_diffrn_reflns_theta_min         0.91
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.978
_exptl_absorpt_correction_T_max  0.8137
_exptl_absorpt_correction_T_min  0.6842
_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    1.293
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             6156
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.645
_refine_diff_density_min         -0.750
_refine_diff_density_rms         0.072
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.033(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     783
_refine_ls_number_reflns         13671
_refine_ls_number_restraints     9
_refine_ls_restrained_S_all      1.006
_refine_ls_R_factor_all          0.0714
_refine_ls_R_factor_gt           0.0442
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0670P)^2^+7.3138P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1078
_refine_ls_wR_factor_ref         0.1238
_reflns_number_gt                10036
_reflns_number_total             13671
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo9004487_si_015.cif
_cod_data_source_block           109
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Trigonal' changed to 'trigonal' 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_Hall     R3
_cod_original_sg_symbol_H-M      R3
_cod_database_code               4024616