Oxetanyl Amino Acids for Peptidomimetics.
Möller, Guido P; Müller, Steffen; Wolfstädter, Bernd T; Wolfrum, Susanne; Schepmann, Dirk; Wünsch, Bernhard; Carreira, Erick M.; Organic letters 19 (2017) 2510–2513; doi:10.1021/acs.orglett.7b00745

data_1545906
_publ_section_title
;
 Oxetanyl Amino Acids for Peptidomimetics.
;
_journal_issue                   10
_journal_name_full               'Organic letters'
_journal_page_first              2510
_journal_page_last               2513
_journal_paper_doi               10.1021/acs.orglett.7b00745
_journal_volume                  19
_journal_year                    2017
_chemical_formula_moiety         'C28 H31 Br N2 O5 S2'
_chemical_formula_sum            'C28 H31 Br N2 O5 S2'
_chemical_formula_weight         619.58
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_date             2017-04-01
_audit_creation_method
;
Olex2 1.2
(compiled 2017.03.28 svn.r3405 for OlexSys, GUI svn.r5335)
;
_cell_angle_alpha                90
_cell_angle_beta                 95.366(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   13.3441(6)
_cell_length_b                   6.3849(2)
_cell_length_c                   16.1360(7)
_cell_measurement_reflns_used    9934
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.54
_cell_measurement_theta_min      2.54
_cell_volume                     1368.77(10)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      99.98
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0264
_diffrn_reflns_av_unetI/netI     0.0471
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            21825
_diffrn_reflns_point_group_measured_fraction_full 0.976
_diffrn_reflns_point_group_measured_fraction_max 0.969
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.545
_diffrn_reflns_theta_min         1.896
_exptl_absorpt_coefficient_mu    1.696
_exptl_absorpt_correction_T_max  0.9509
_exptl_absorpt_correction_T_min  0.6129
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.503
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.412
_refine_diff_density_min         -0.277
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details
;
 Flack x determined using 2215 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.004(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.983
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     350
_refine_ls_number_reflns         6125
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.983
_refine_ls_R_factor_all          0.0302
_refine_ls_R_factor_gt           0.0249
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0214P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0543
_refine_ls_wR_factor_ref         0.0554
_reflns_Friedel_coverage         0.779
_reflns_Friedel_fraction_full    0.948
_reflns_Friedel_fraction_max     0.932
_reflns_number_gt                5493
_reflns_number_total             6125
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol7b00745_si_005.cif
_cod_data_source_block           mo_ca011012_0ma
_cod_depositor_comments
'Adding full bibliography for 1545906--1545907.cif.'
_cod_database_code               1545906
_shelxl_version_number           2014/6
_shelx_estimated_absorpt_t_max   0.951
_shelx_estimated_absorpt_t_min   0.613
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C7(H7)
2.b Secondary CH2 refined with riding coordinates:
 C14(H14A,H14B), C15(H15A,H15B), C16(H16A,H16B)
2.c Aromatic/amide H refined with riding coordinates:
 C3(H3), C4(H4), C9(H9), C10(H10), C12(H12), C13(H13), C18(H18), C19(H19),
 C20(H20), C21(H21), C22(H22), C23(H23), C24(H24), C25(H25)
2.d Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C27(H27A,H27B,H27C), C28(H28A,H28B,H28C)
;
_olex2_submission_special_instructions 'No special instructions were received'