Samarium diiodide-promoted intramolecular ketone–ester coupling reaction: novel cyclization and ring expansion pathway
作者:Kazuki Iwaya、Momoe Nakamura、Eietsu Hasegawa
DOI:10.1016/s0040-4039(02)01007-9
日期:2002.7
2-substituted-1-indanone-2-carboxylates were treated with samarium diiodide (SmI2), ring expansion products such as 3-substituted-1,2-naphthoquinones were isolated. Alcohols were also obtained as the mixture of cis- and trans-isomers of hydroxy and ester substituents. A reaction mechanism involving intramolecular addition of samarium ketyl radicals to ester substituents followed by ring expansion was proposed
当用二碘化((SmI 2)处理2-取代的1-茚满酮-2-羧酸乙酯时,分离出诸如3-取代的1,2-萘醌的扩环产物。还获得了羟基和酯取代基的顺式和反式异构体的混合物的醇。提出了一种将mechanism酮基mar分子内加成到酯取代基上,然后进行环扩环的反应机理,以形成一碳均聚物。类似地,使1-取代的2-氧代-1-氧-1-环戊烷甲酸乙酯与SmI 2反应产生3-取代的-2-羟基-2-环己烯酮以及相应的醇。