Regioselective Synthesis of Polyfluoroalkyl Substituted 6,7-Dihydrobenzisoxazolones
作者:Tatyana S. Khlebnicova、Yurii A. Piven'、Veronica G. Isakova、Alexander V. Baranovsky、Fedor A. Lakhvich、Alexander E. Sorochinsky、Igor I. Gerus
DOI:10.1002/jhet.3218
日期:2018.7
Regioselective methods for synthesis of hitherto unreported both 6,7‐dihydro‐1,2‐benzisoxazol‐4(5H)‐ones and 6,7‐dihydro‐2,1‐benzisoxazol‐4(5H)‐ones with perfluoroalkyl or halogenodifluoromethyl substituents have been developed. 3‐Polyfluoroalkyl‐6,7‐dihydro‐1,2‐benzisoxazol‐4(5H)‐ones were prepared by the cyclocondensation of 2‐polyfluoroalkanoylcyclohexane‐1,3‐diones with hydroxylamine. The regioisomeric
用于迄今未报告合成区域选择性方法均-6,7-二氢-1,2-苯并异恶唑-4(5 ħ) -酮和6,7-二氢-2,1-苯并异恶唑-4(5 ħ) -酮与全氟烷基或已经开发了卤代二氟甲基取代基。通过2-聚氟烷酰基环己烷-1,3-二酮与羟胺的环缩合反应制得3-Polyfluoroalkyl-6,7-dihydro-1,2-benzisoxazol-4(5 H)-ones。区域异构体3-聚氟烷基-6,7-二氢-2,1-苯并恶唑-4(5 H)-是通过将2-聚氟烷酰基环己烷-1,3-二酮转化为乙烯基氯化物而合成的,用叠氮化钠在二甲基甲酰胺中制得粗制的3-氯-2-聚氟链烷酰基-2-环己烯-1-酮