Oxyazapeptides: Synthesis, Structure Determination, and Conformational Analysis
Suvendu Biswas; Nader E. Abo-Dya; Alexander Oliferenko; Amir Khiabani; Peter J. Steel; Khalid A. Alamry; Alan R. Katritzky; Journal of Organic Chemistry 78 (2013) 8502–8509; doi:10.1021/jo401234g

data_4028535
_publ_section_title
;
 Oxyazapeptides: Synthesis, Structure Determination, and Conformational
 Analysis
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              8502
_journal_page_last               8509
_journal_paper_doi               10.1021/jo401234g
_journal_volume                  78
_journal_year                    2013
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C32 H43 N3 O7'
_chemical_formula_sum            'C32 H43 N3 O7'
_chemical_formula_weight         581.69
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.89551(9)
_cell_length_b                   17.34558(16)
_cell_length_c                   22.8169(2)
_cell_measurement_reflns_used    17716
_cell_measurement_temperature    120(1)
_cell_measurement_theta_max      73.7023
_cell_measurement_theta_min      3.1978
_cell_volume                     3124.82(5)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.21 (release 14-08-2012 CrysAlis171 .NET)
(compiled Sep 14 2012,17:21:16)
;
_computing_data_collection
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CrysAlisPro, Agilent Technologies,
Version 1.171.36.21 (release 14-08-2012 CrysAlis171 .NET)
(compiled Sep 14 2012,17:21:16)
;
_computing_data_reduction
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CrysAlisPro, Agilent Technologies,
Version 1.171.36.21 (release 14-08-2012 CrysAlis171 .NET)
(compiled Sep 14 2012,17:21:16)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      120(1)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0442
_diffrn_reflns_av_sigmaI/netI    0.0261
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            31876
_diffrn_reflns_theta_full        67.50
_diffrn_reflns_theta_max         67.50
_diffrn_reflns_theta_min         3.20
_exptl_absorpt_coefficient_mu    0.711
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.9144
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.21 (release 14-08-2012 CrysAlis171 .NET)
(compiled Sep 14 2012,17:21:16)
empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.236
_exptl_crystal_description       block
_exptl_crystal_F_000             1248
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.566
_refine_diff_density_min         -0.177
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.10(15)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     380
_refine_ls_number_reflns         5649
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0385
_refine_ls_R_factor_gt           0.0354
_refine_ls_shift/su_max          0.019
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0490P)^2^+0.7780P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0895
_refine_ls_wR_factor_ref         0.0925
_reflns_number_gt                5322
_reflns_number_total             5649
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo401234g_si_002.cif
_cod_data_source_block           3pjs26
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