Small Head-to-Tail Macrocyclic α-Peptoids.
Culf, Adrian S.; Cuperlović-Culf, Miroslava; Léger, Daniel A; Decken, Andreas; Organic letters 16 (2014) 2780–2783; doi:10.1021/ol501102b

data_1515990
_publ_section_title
;
 Small Head-to-Tail Macrocyclic \a-Peptoids.
;
_journal_issue                   10
_journal_name_full               'Organic letters'
_journal_page_first              2780
_journal_page_last               2783
_journal_paper_doi               10.1021/ol501102b
_journal_volume                  16
_journal_year                    2014
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C27 H27 N3 O3'
_chemical_formula_sum            'C27 H27 N3 O3'
_chemical_formula_weight         441.52
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      29
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 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            8
_cell_length_a                   17.384(5)
_cell_length_b                   9.096(2)
_cell_length_c                   28.177(7)
_cell_measurement_reflns_used    9004
_cell_measurement_temperature    188(1)
_cell_measurement_theta_max      25.88
_cell_measurement_theta_min      2.45
_cell_volume                     4455(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'Bruker SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      188(1)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'Bruker AXS SMART1000/P4'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0542
_diffrn_reflns_av_unetI/netI     0.0586
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            28985
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.24
_diffrn_source                   'fine-focus sealed tube'
_diffrn_source_type              K760
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.9871
_exptl_absorpt_correction_T_min  0.9497
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.316
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Rod
_exptl_crystal_F_000             1872
_exptl_crystal_recrystallization_method 'CHCl3, MeOH, DMF'
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.193
_refine_diff_density_min         -0.188
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.115
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     595
_refine_ls_number_reflns         8229
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.115
_refine_ls_R_factor_all          0.0893
_refine_ls_R_factor_gt           0.0411
_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^)+(0.0230P)^2^+0.6383P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0725
_refine_ls_wR_factor_ref         0.0877
_reflns_number_gt                5475
_reflns_number_total             8229
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol501102b_si_002.cif
_cod_data_source_block           ac131169
_cod_depositor_comments
'Adding full bibliography for 1515988--1515991.cif.'
_cod_database_code               1515990