Regio- and stereoselective ring-opening of aziridines: a click chemistry approach to chiral amino alcohols and triazole-modified compounds.
Szymańska, Julia; Palusiak, Marcin; Rybarczyk-Pirek, Agnieszka J; Wiosna-Sałyga, Gabriela; Rachwalski, Michał; Pieczonka, Adam M.; Organic & biomolecular chemistry 24 (2026) 2254–2260; doi:10.1039/d6ob00147e

data_7161003
_publ_section_title
;
 Regio- and stereoselective ring-opening of aziridines: a click chemistry
 approach to chiral amino alcohols and triazole-modified compounds.
;
_journal_issue                   11
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2254
_journal_page_last               2260
_journal_paper_doi               10.1039/d6ob00147e
_journal_volume                  24
_journal_year                    2026
_chemical_absolute_configuration rm
_chemical_formula_sum            'C21 H26 N4 O'
_chemical_formula_weight         350.46
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014
_audit_update_record
;
2025-11-09 deposited with the CCDC.	2026-02-19 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.60730(10)
_cell_length_b                   14.1220(2)
_cell_length_c                   24.5457(3)
_cell_measurement_reflns_used    13079
_cell_measurement_temperature    294.58(10)
_cell_measurement_theta_max      76.4410
_cell_measurement_theta_min      3.1060
_cell_volume                     1943.68(5)
_computing_structure_refinement  'SHELXL-2014 (Sheldrick, 2014)'
_diffrn_ambient_temperature      294.58(10)
_diffrn_detector                 'Hybrid Pixel Array Detector'
_diffrn_detector_area_resol_mean 10.0000
_diffrn_detector_type            HyPix
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'XtaLAB Synergy, Dualflex, HyPix'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0292
_diffrn_reflns_av_unetI/netI     0.0179
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.981
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            18682
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.955
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         76.761
_diffrn_reflns_theta_min         3.601
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'PhotonJet (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.597
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.64202
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.43.143a (Rigaku Oxford Diffraction, 2024)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.194
_exptl_crystal_description       block
_exptl_crystal_F_000             752
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.513
_refine_diff_density_min         -0.185
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details
;
 Flack x determined using 1424 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.19(11)
_refine_ls_extinction_coef       0.0034(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   1.058
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     263
_refine_ls_number_reflns         3906
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.0464
_refine_ls_R_factor_gt           0.0441
_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^)+(0.0962P)^2^+0.1011P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1335
_refine_ls_wR_factor_ref         0.1371
_reflns_Friedel_coverage         0.672
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.920
_reflns_number_gt                3636
_reflns_number_total             3906
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d6ob00147e2.cif
_cod_data_source_block           shelx_CCDC3
_cod_depositor_comments
'Adding full bibliography for 7161000--7161011.cif.'
_cod_database_code               7161003
_oxdiff_exptl_absorpt_empirical_full_min 0.499
_oxdiff_exptl_absorpt_empirical_full_max 1.477
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_shelxl_version_number           2014-1
_shelx_res_checksum              5319