Find in Library
Search millions of books, articles, and more
Indexed Open Access Databases
Stereoselective Asymmetric Syntheses of Molecules with a 4,5-Dihydro-1<i>H</i>-[1,2,4]-Triazoline Core Possessing an Acetylated Carbohydrate Appendage: Crystal Structure, Spectroscopy, and Pharmacology
oleh: Anwaar S. Al Maqbali, Nawal K. Al Rasbi, Wajdi M. Zoghaib, Nallusamy Sivakumar, Craig C. Robertson, Musa S. Shongwe, Norbert Grzegorzek, Raid J. Abdel-Jalil
Format: | Article |
---|---|
Diterbitkan: | MDPI AG 2024-06-01 |
Deskripsi
A new series of chiral 4,5-dihydro-1<i>H</i>-[1,2,4]-triazoline molecules, featuring a β-ᴅ-glucopyranoside appendage, were synthesized via a 1,3-dipolar cycloaddition reaction between various hydrazonyl chlorides and carbohydrate Schiff bases. The isolated enantiopure triazolines (<b>8a</b>–<b>j</b>) were identified through high-resolution mass spectrometry (HRMS) and vibrational spectroscopy. Subsequently, their solution structures were elucidated through NMR spectroscopic techniques. Single-crystal X-ray analysis of derivative <b>8b</b> provided definitive evidence for the 3-D structure of this compound and revealed important intermolecular forces in the crystal lattice. Moreover, it confirmed the (<i>S</i>)-configuration at the newly generated stereo-center. Selected target compounds were investigated for anti-tumor activity in 60 cancer cell lines, with derivative <b>8c</b> showing the highest potency, particularly against leukemia. Additionally, substituent-dependent anti-fungal and anti-bacterial behavior was observed.