Stereochemical Prins cyclization: electronic versus steric effects on the synthesis of 2,4,6-trisubstituted tetrahydropyran rings
作者:Kok-Ping Chan、Ai-Hua Seow、Teck-Peng Loh
DOI:10.1016/j.tetlet.2006.11.023
日期:2007.1
A convenient approach towards the synthesis of both syn- and anti-2,4,6-chlorotetrahydropyrans has been developed. The electronic and steric influences on the stereochemistry of the Prins cyclized products were investigated based on the substituents of the homoallylic alcohol.
(±)-cis-(6-Ethyl-tetrahydropyran-2-yl)-formic acid: a novel substance with antinociceptive properties
作者:L.S.M Miranda、Bruno G Marinho、Suzana G Leitão、Maria Eline Matheus、Patrı́cia D Fernandes、M.L.A.A Vasconcellos
DOI:10.1016/j.bmcl.2003.12.075
日期:2004.3
We described in this paper the first synthesis to the (+/-) cis (6-ethyl-tetrahydropyran-2-yl) formic acid (1) using the very efficient Prins cyclization reaction as strategy to construction of its tetrahydropyran skeleton. This new compound presented a significant antinociceptive property by the tail-flick model. (C) 2004 Elsevier Ltd. All rights reserved.