Accessing the disallowed conformations of peptides employing amide-to-imidate modification.
Reddy, Damodara N.; Thirupathi, Ravula; Prabhakaran, Erode N.; Chemical communications (Cambridge, England) 47 (2011) 9417–9419; doi:10.1039/c1cc13515e

data_7125600
_publ_section_title
;
 Accessing the disallowed conformations of peptides employing
 amide-to-imidate modification.
;
_journal_issue                   33
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              9417
_journal_page_last               9419
_journal_paper_doi               10.1039/c1cc13515e
_journal_volume                  47
_journal_year                    2011
_chemical_absolute_configuration rm
_chemical_compound_source        synthesized
_chemical_formula_moiety         'C17 H31 N3 O4'
_chemical_formula_sum            'C17 H31 N3 O4'
_chemical_formula_weight         341.45
_chemical_melting_point          442.5(5)
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      4
_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
_cell_angle_alpha                90
_cell_angle_beta                 94.933(5)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   6.031(5)
_cell_length_b                   8.634(5)
_cell_length_c                   18.780(5)
_cell_measurement_reflns_used    3746
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.99
_cell_measurement_theta_min      2.60
_cell_volume                     974.3(10)
_computing_cell_refinement       Apex2
_computing_data_collection       'Bruker kappa Apex2'
_computing_data_reduction        SAINT32
_computing_molecular_graphics
'Ortep-3 (Farrugia, 1997) and CAMERON (Watkin et al., 1993)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Brucker kappa apex2 CCD area detector'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0219
_diffrn_reflns_av_sigmaI/netI    0.0409
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            6176
_diffrn_reflns_reduction_process
;
;
_diffrn_reflns_theta_full        25.99
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         2.60
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  0.9836
_exptl_absorpt_correction_T_min  0.9756
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Apex2 (Bruker)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.164
_exptl_crystal_density_method    'Not Measured'
_exptl_crystal_description       ' block'
_exptl_crystal_F_000             372
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.571
_refine_diff_density_min         -0.288
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   2.0(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     223
_refine_ls_number_reflns         3746
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0730
_refine_ls_R_factor_gt           0.0568
_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^)+(0.0688P)^2^+0.2547P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1401
_refine_ls_wR_factor_ref         0.1503
_reflns_number_gt                3005
_reflns_number_total             3746
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1cc13515e.txt
_cod_data_source_block           damu531_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_chemical_melting_point' value '442-443' was changed to
'442.5(5)' -- the average value was taken and precision was
estimated.

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/RSC/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7125600