New homochiral 6-ethyl-7,8-indolizidinediol derivatives, related to the bioactive dihydroxylated indolizidine alkaloids, are reported to be easily accessible in four or five steps from enantiopure 9-hydroxy-octahydrofuro[3,2-f]indolizin-6(2H)-ones in good overall yields and high diastereomeric purities. The simple procedure used herein involves a regiospecific THF-ring opening as a key step, in addition to the C-Br linkage reduction, and the alcohol deprotection followed by lactam reduction. (C) 2010 Elsevier Ltd. All rights reserved.
Combined Chemical, Biological and Theoretical DFT-QTAIM Study of Potent Glycosidase Inhibitors Based on Quaternary Indolizinium Salts
ring-opening reaction as a key step. Quarternization of these species was also studied and comparison was made to the quaternizations of other substituted indolizidines. Importantly, a combinedtheoreticalDFT-QTAIMstudy has cast light on the various factors that explain the observed conformational selectivity. The inhibitory properties of the six synthesized indolizidines were then investigated against