An improved synthesis of 1-(1,2,3,6-tetrahydro-1-methyl-4-pyridinyl)ethanone, isoarecolone
作者:J. Warren Beach
DOI:10.1002/jhet.5570340637
日期:1997.11
A convenient synthesis of 1-(1,2,3,6-tetrahydro-1-methyl-4-pyridinyl)ethanone, isoarecolone, starting with 4-acetylpyridine is presented. 4-Acetylpyridine was protected as the ketal followed by reaction with iodomethane to give the quaterary salt. The quaterary salt was reduced with sodium borohydride followed by deprotection to give isoarecolone in 80% overall yield.
提出了一种以4-乙酰基吡啶为起始原料的1-(1,2,3,6-四氢-1-甲基-4-吡啶基)乙酮异戊烯酮的简便合成方法。将4-乙酰基吡啶作为缩酮进行保护,然后与碘甲烷反应,得到季盐。用硼氢化钠还原季盐,然后脱保护得到异丁烯酮,总产率为80%。