Backbone Modification of β-Hairpin-Forming Tetrapeptides in Asymmetric Acyl Transfer Reactions
Peng Chen; Jin Qu; Journal of Organic Chemistry 76 (2011) 2994–3004; doi:10.1021/jo200403g

data_4026271
_publ_section_title
;
 Backbone Modification of \b-Hairpin-Forming Tetrapeptides in Asymmetric
 Acyl Transfer Reactions
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              2994
_journal_page_last               3004
_journal_paper_doi               10.1021/jo200403g
_journal_volume                  76
_journal_year                    2011
_chemical_formula_moiety         'C34 H37 N3 O5 S'
_chemical_formula_sum            'C34 H37 N3 O5 S'
_chemical_formula_weight         599.73
_space_group_IT_number           1
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  'P 1'
_symmetry_space_group_name_H-M   'P 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.326(8)
_cell_angle_beta                 102.534(9)
_cell_angle_gamma                91.518(11)
_cell_formula_units_Z            2
_cell_length_a                   10.6042(15)
_cell_length_b                   11.3172(18)
_cell_length_c                   13.244(2)
_cell_measurement_reflns_used    5661
_cell_measurement_temperature    113(2)
_cell_measurement_theta_max      28.0
_cell_measurement_theta_min      1.6
_cell_volume                     1550.9(4)
_computing_cell_refinement       CrystalClear
_computing_data_collection       CrystalClear
_computing_data_reduction        CrystalClear
_computing_publication_material  'CrystalStructure 3.8'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      113(2)
_diffrn_detector_area_resol_mean 14.63
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Rigaku Saturn CCD area detector'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  multilayer
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0581
_diffrn_reflns_av_sigmaI/netI    0.1171
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            17247
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.80
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.151
_exptl_absorpt_correction_T_max  0.9763
_exptl_absorpt_correction_T_min  0.9534
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   CrystalClear
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.284
_exptl_crystal_description       prism
_exptl_crystal_F_000             636
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.457
_refine_diff_density_min         -0.400
_refine_diff_density_rms         0.085
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.01(11)
_refine_ls_extinction_coef       0.164(8)
_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   1.080
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     782
_refine_ls_number_reflns         11127
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.080
_refine_ls_R_factor_all          0.0778
_refine_ls_R_factor_gt           0.0695
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1203P)^2^+0.3751P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2177
_refine_ls_wR_factor_ref         0.2218
_reflns_number_gt                7736
_reflns_number_total             11127
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo200403g_si_002.cif
_cod_data_source_block           shelxl
_cod_original_cell_volume        1550.8(4)
_cod_database_code               4026271