Novel three-component domino processes to polyheterocycles are developed. Reaction of an allylamine (3), an aldehyde (4) and an α-isocyanoacetamide (5) in methanol at room temperature provides an efficient access to oxa-bridged tricycle (1) as a single diastereoisomer. In this one-pot process, one C–N, one C–O and three C–C bonds are formed with concomitant creation of five asymmetric centers. While
Isoquinolone derivatives, their production and use
申请人:Takeda Chemical Industries, Ltd.
公开号:US05189043A1
公开(公告)日:1993-02-23
A compound of the formula (I): ##STR1## wherein X is --CH.sub.2 -CH.sub.2 -- or --CH.dbd.CH--, Y is ##STR2## Z is an oxygen or sulfur atom, R.sup.1 and R.sup.2 are independently a hydrogen atom, an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group and ring A is an optionally substituted 6-membered homocyclic ring, or its ester or salt which is useful as an inhibitory agent for the biosynthesis of the cholesterol.