base-Co(AcO)2, reveals high catalytic performance within the synthesis of pyran derivatives using the multicomponent reaction of aldehydes, malononitrile and 2-naphthol (or cyclohexane-1,3-dione) in water. The reactions afforded the desired products in high yields (up to 97% and 95%). The substantial feature is that the mesoporous-complex catalyst could be easily separated from the reaction mixture by centrifugation
Task Specific Onium Salt as Soluble Support in Multicomponent Synthesis of 4-Aryl-2-amino-3-ethoxycarbonyl-naphthopyrans
作者:Cuifen Lu、Li Zhang、Guichun Yang、Zuxing Chen
DOI:10.1002/cjoc.201190023
日期:2010.12
this paper was presented an application of taskspecificoniumsalt as solublesupport in multicomponentsynthesis of 2‐amino‐3‐ethoxycarbonyl‐naphthopyrans. The starting task‐specificoniumsalt was functionalized in good yield with chloroethyl alcohol, followed by three steps containing esterification, three components reaction and cleavage from oniumsalt to afford naphthopyrans in 60% –88% overall
本文介绍了任务特异性鎓盐作为可溶性支持物在2-氨基-3-乙氧基羰基萘并吡喃的多组分合成中的应用。起始任务专用的鎓盐用氯乙醇以高收率官能化,然后进行三个步骤,包括酯化,三组分反应和从鎓盐上裂解,得到萘并吡喃,总产率为60%–88%。所有产物均通过IR,1 H NMR,13 C NMR和MS技术表征。