An Easy, Stereoselective Synthesis of Hexahydroisoindol-4-ones under Phosphine Catalysis
作者:Deepti Duvvuru、Jean-François Betzer、Pascal Retailleau、Gilles Frison、Angela Marinetti
DOI:10.1002/adsc.201000701
日期:2011.2.11
A new synthetic approach to hexahydroisoindol-4-ones is reported, based on the formal [3+2] cyclization reaction between N-arylsulfonylimines and cyclic conjugated dienes, under phosphine catalysis. Key substrates are 3-vinylcyclohex-2-enones with electron-withdrawing substituents (ester, amido, cyano, phosphoryl and keto groups) on the exocyclic double bond, which afford the three-atom synthons for
据报道,在膦催化下,N-芳基磺酰亚胺类化合物与环状共轭二烯之间的正式[3 + 2]环化反应,可合成出一种新的六氢异吲哚-4-酮合成方法。关键底物是在环外双键上具有吸电子取代基(酯基,酰胺基,氰基,磷酰基和酮基)的3-乙烯基环己基-2-烯酮,它为构建吡咯啉环提供了三个原子的合成子。在这些环空中观察到总的顺式立体选择性。基于氘代实验和密度泛函理论(DFT)计算,已经证明了反应的范围并考虑了机理问题。