Chemoselective Nitrile Oxide-Alkyne 1,3-Dipolar Cycloaddition Reactions from Nitroalkane-Tethered Peptides.
Reja, Rahi M.; Sunny, Sereena; Gopi, Hosahudya N.; Organic letters 19 (2017) 3572–3575; doi:10.1021/acs.orglett.7b01498

data_1546356
_publ_section_title
;
 Chemoselective Nitrile Oxide-Alkyne 1,3-Dipolar Cycloaddition Reactions
 from Nitroalkane-Tethered Peptides.
;
_journal_issue                   13
_journal_name_full               'Organic letters'
_journal_page_first              3572
_journal_page_last               3575
_journal_paper_doi               10.1021/acs.orglett.7b01498
_journal_volume                  19
_journal_year                    2017
_chemical_formula_moiety         'C14 H26 N2 O6'
_chemical_formula_sum            'C14 H26 N2 O6'
_chemical_formula_weight         318.37
_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   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 115.928(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.289(4)
_cell_length_b                   20.701(8)
_cell_length_c                   10.602(6)
_cell_measurement_reflns_used    9802
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      21.28
_cell_measurement_theta_min      2.35
_cell_volume                     1833.5(15)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.2494
_diffrn_reflns_av_unetI/netI     0.1815
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            84907
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.991
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.401
_diffrn_reflns_theta_min         2.136
_exptl_absorpt_coefficient_mu    0.090
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.153
_exptl_crystal_description       roadshape
_exptl_crystal_F_000             688
_refine_diff_density_max         0.276
_refine_diff_density_min         -0.310
_refine_diff_density_rms         0.086
_refine_ls_abs_structure_details
;
 Flack x determined using 1599 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.1(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.910
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     409
_refine_ls_number_reflns         9147
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.910
_refine_ls_R_factor_all          0.2068
_refine_ls_R_factor_gt           0.0713
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.7977P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1463
_refine_ls_wR_factor_ref         0.2022
_reflns_Friedel_coverage         0.942
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.988
_reflns_number_gt                4739
_reflns_number_total             9226
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol7b01498_si_002.cif
_cod_data_source_block           tri_a
_cod_depositor_comments
'Adding full bibliography for 1546355--1546356.cif.'
_cod_database_code               1546356
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              41953
_shelx_hkl_checksum              45711