Multicomponent synthesis of tripeptides containing pipecolic acid derivatives: selective induction of cis- and trans-imide bonds into peptide backbones
Maison, Wolfgang; Lützen, Arne; Kosten, Marc; Schlemminger, Imre; Westerhoff, Ole; Saak, Wolfgang; Martens, Jürgen; Journal of the Chemical Society, Perkin Transactions 1  (2000) 1867–; doi:10.1039/b002258f

data_7213327
_publ_section_title
;
 Multicomponent synthesis of tripeptides containing pipecolic acid
 derivatives: selective induction of cis- and trans-imide bonds into
 peptide backbones
;
_journal_issue                   12
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 1'
_journal_page_first              1867
_journal_paper_doi               10.1039/b002258f
_journal_year                    2000
_chemical_formula_sum            'C21 H23 N O3'
_chemical_formula_weight         337.40
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 105.449(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.1496(7)
_cell_length_b                   8.7609(6)
_cell_length_c                   18.8400(12)
_cell_measurement_temperature    193(2)
_cell_volume                     1773.8(2)
_computing_cell_refinement       'IPDS (Stoe, 1997)'
_computing_data_collection       'IPDS (Stoe, 1997)'
_computing_data_reduction        'XRED (Stoe, 1997)'
_computing_molecular_graphics    'XSTEP (Stoe, 1997)'
_computing_publication_material  'SHELX-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Stoe IPDS'
_diffrn_measurement_method       'imaging plate'
_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  0.1085
_diffrn_reflns_av_sigmaI/netI    0.0699
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            12820
_diffrn_reflns_theta_full        26.05
_diffrn_reflns_theta_max         26.05
_diffrn_reflns_theta_min         2.24
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.9679
_exptl_absorpt_correction_T_min  0.9607
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.263
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
_exptl_crystal_F_000             720
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.45
_exptl_crystal_size_min          0.39
_refine_diff_density_max         0.197
_refine_diff_density_min         -0.270
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.942
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     318
_refine_ls_number_reflns         3465
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.942
_refine_ls_R_factor_all          0.0572
_refine_ls_R_factor_gt           0.0391
_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^)+(0.0587P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0980
_refine_ls_wR_factor_ref         0.1063
_reflns_number_gt                2558
_reflns_number_total             3465
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b002258fsup1.cif
_cod_data_source_block           wm242
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7213327