Synthesis of substituted piperidines, decahydroquinolines and octahydroindolizines by radical rearrangement reactions of 2-alkylideneaziridines
作者:Natacha Prévost、Michael Shipman
DOI:10.1016/s0040-4020(02)00730-5
日期:2002.8
Rearrangement of a variety of 3-(2-methyleneaziridin-1-yl)propyl radicals, generated using Bu3SnH/AIBN by homolytic cleavage of phenylselenide substituted 2-methyleneaziridines, produces 3-methylenepiperidines in yields ranging from 58 to 68%. By combining this radical rearrangement with an additional 5-exo-trig cyclisation, this method provides an octahydroindolizine with moderate levels of diastereocontrol
Copper-Catalyzed Alkene Arylation with Diaryliodonium Salts
作者:Robert J. Phipps、Lindsay McMurray、Stefanie Ritter、Hung A. Duong、Matthew J. Gaunt
DOI:10.1021/ja3039807
日期:2012.7.4
synthetic organic chemistry. We report a new approach to alkene arylation using diaryliodoniumsalts and Cu catalysis. Using a range of simple alkenes, we have shown that the product outcomes differ significantly from those commonly obtained by the Heck reaction. We have used these insights to develop a number of new tandem and cascade reactions that transform readily available alkenes into complex arylated
cladosporin inhibitors against Plasmodium falciparum lysyl-tRNA synthetase (PfKRS). The series retains selectivity against its human counterpart but it was observed that replacing the tetrahydropyran moiety by piperidine reduces potency. Co-crystals of Cla−B and Cla−C with PfKRS reveal key interactions and loop readjustments that allow drug binding and inhibition of the enzyme.
amino)-2-butanol derivatives I were prepared by ring-opening reaction of epoxides II with excess amine, and their antifungalactivities were evaluated as topical agents. Azolyl-cyclic amine derivatives with a methylene group showed extremely strong activity with a broad spectrum in vitro. In general, anti-Trichophyton mentagrophytes activities of most of the topical antifungalagents are substantially