Aza-β^3^-Cyclohexapeptides: Pseudopeptidic Macrocycles with Interesting Conformational and Configurational Properties Slow Pyramidal Nitrogen Inversion in 24-Membered Rings!
Philippe Le Grel; Arnaud Salaün; Michel Potel; Barbara Le Grel; Fredéric Lassagne; Journal of Organic Chemistry 71 (2006) 5638–5645; doi:10.1021/jo0608467

data_4021832
_publ_section_title
;
 Aza-\b^3^-Cyclohexapeptides: Pseudopeptidic Macrocycles with
 Interesting Conformational and Configurational Properties
 Slow Pyramidal Nitrogen Inversion in 24-Membered Rings!
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              5638
_journal_page_last               5645
_journal_paper_doi               10.1021/jo0608467
_journal_volume                  71
_journal_year                    2006
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C36 H56 N12 O6'
_chemical_formula_sum            'C36 H56 N12 O6'
_chemical_formula_weight         752.93
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.2
_audit_creation_date             2004-09-16T11:03:28-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 123.41(1)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   25.344(3)
_cell_length_b                   10.264(1)
_cell_length_c                   19.173(2)
_cell_measurement_reflns_used    4984
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      2.91
_cell_measurement_wavelength     0.71073
_cell_volume                     4163.3(9)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector                 'CCD plate'
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'CCD rotation images, thick slices'
_diffrn_orient_matrix_type       'by Nonius Collect from scalepack cell'
_diffrn_orient_matrix_UB_11      0.114653E-1
_diffrn_orient_matrix_UB_12      -0.277841E-1
_diffrn_orient_matrix_UB_13      -0.400182E-1
_diffrn_orient_matrix_UB_21      0.8559E-2
_diffrn_orient_matrix_UB_22      -0.901906E-1
_diffrn_orient_matrix_UB_23      0.235492E-1
_diffrn_orient_matrix_UB_31      -0.450519E-1
_diffrn_orient_matrix_UB_32      -0.242054E-1
_diffrn_orient_matrix_UB_33      -0.418108E-1
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.012
_diffrn_reflns_av_unetI/netI     0.0243
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            9260
_diffrn_reflns_theta_full        27.5
_diffrn_reflns_theta_max         27.5
_diffrn_reflns_theta_min         2.94
_diffrn_source                   'Enraf Nonius FR590'
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.201
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'hexagonal ^latelet'
_exptl_crystal_F_000             1616
_exptl_crystal_size_max          0.6
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.235
_refine_diff_density_min         -0.24
_refine_diff_density_rms         0.036
_refine_ls_extinction_coef       0.0051(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     257
_refine_ls_number_reflns         4767
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0486
_refine_ls_R_factor_gt           0.0412
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0556P)^2^+2.2174P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1074
_refine_ls_wR_factor_ref         0.1137
_reflns_number_gt                4080
_reflns_number_total             4767
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo0608467si20060418_105244.cif
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               4021832