The synthesis of 4-vinylquinoline has been carried out by means of the Wittig reaction between 4-quino-linecarbaldehyde and the methyl triphenylphosphonium ylide in dimethyl sulphoxide in good yield. Dehydration of the 4-(1-hydroxyethyl)quinoline and their xanthate derivative, give equimolar amounts of 4-ethylquinoline and 4-acetylquinoline while small amounts of 4-vinylquinoline were found. Dehydrochlorination of 4-(1-chloroethyl)quinoline in ethanol-sodium hydroxide provides 4-ethyl-3-ethoxyquinoline in good yield, but 4-vinylquinoline is a minor reaction product.

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4-乙烯基喹啉的合成：4-（1-羟乙基）喹啉及其相关衍生物的热解重排

4-乙烯基喹啉的合成已经通过4-喹啉-甲醛与甲基三苯基phosph叶立德在二甲亚砜中的Wittig反应以良好的产率进行了。4-（1-羟乙基）喹啉及其黄药衍生物的脱水，得到等摩尔量的4-乙基喹啉和4-乙酰基喹啉，而发现少量的4-乙烯基喹啉。4-（1-氯乙基）喹啉在乙醇-氢氧化钠中的脱氯化氢反应可得到高产率的4-乙基-3-乙氧基喹啉，但4-乙烯基喹啉是次要的反应产物。