The claisen rearrangement in synthesis: acceleration of the johnson orthoester protocol en route to bicyclic lactones
作者:Graham B. Jones、Robert S. Huber、Sotheary Chau
DOI:10.1016/s0040-4020(01)80306-9
日期:1993.1
Catalysis of the Claisen orthoester rearrangement of triethyl orthoacetate and a number of 2-cycloalken-1-ols has been achieved using acidic catalysis and brief microwave thermolysis in DMF. Unlike conventional methods of thermolysis, very high yields of rearranged products are typically obtained in less than ten minutes, and the Claisen products themselves require no further purification. The synthetic
在DMF中使用酸性催化和短暂的微波热解已经实现了对原乙酸三乙酯的Claisen原酸酯重排和许多2-cycloalken-1-ol的催化。与常规的热解方法不同,通常在不到十分钟的时间内即可获得很高产率的重排产物,而克莱森产品本身无需进一步纯化。如此获得的产物的合成效用在官能化的双环内酯的一般合成中得到证明。