Synthesis of novel cyclic α-amino acid derivatives via a one-pot sequential Petasis reaction/palladium catalysed process
作者:Ronald Grigg、Visuvanathar Sridharan、Abirami Thayaparan
DOI:10.1016/j.tetlet.2003.09.218
日期:2003.12
novel one pot Petasis reaction/palladium catalysed process is described involving 2-iodo/bromo benzylamine, ethyl glyoxalate and aryl/heteroaryl boronic acids. The in situ generated carbinolamine/imine undergoes the Petasis reaction to afford 2 which reacts with carbon monoxide or allene (1 atm) in the presence of Pd(0) to generate acyl palladium or π-allyl palladium species which are intercepted intramolecularly
描述了一种新颖的一锅式Petasis反应/钯催化的方法,该方法涉及2-碘/溴苄胺,乙二酸乙二酸酯和芳基/杂芳基硼酸。原位生成的甲醇胺/亚胺经历Petasis反应,生成2,在Pd(0)存在下与一氧化碳或丙二烯(1 atm)反应,生成酰基钯或π-烯丙基钯,它们被近端分子内拦截仲胺以高收率得到异吲哚酮/ 4-亚甲基-3,4-二氢异喹啉α-氨基酸衍生物。