A new synthesis of β,γ-alkenyl carboxylic acids from α,β-alkenyl carboxylic acid chlorides and α,β-alkenyl aldehydes with one-carbon elongation
作者:Tsuyoshi Satoh、Akira Nakamura、Atsuko Iriuchijima、Yasumasa Hayashi、Ko-ichi Kubota
DOI:10.1016/s0040-4020(01)00983-8
日期:2001.11
Reaction of the lithium α-sulfinyl carbanion of chloromethyl phenyl sulfoxide with α,β-alkenyl carboxylic acid chlorides gave γ,δ-alkenyl α-chloro-β-keto sulfoxides in variable yields. The keto sulfoxides were also synthesized from α,β-alkenyl aldehydes in two steps in good overall yields: addition of the lithium α-sulfinyl carbanion of chloromethyl phenyl sulfoxide to α,β-alkenyl aldehydes followed
氯甲基苯基亚砜的α-亚磺酰基锂的锂与α,β-烯基羧酸氯化物的反应以可变的产率得到了γ,δ-烯基α-氯-β-酮亚砜。还可以分两步从α,β-烯基醛类化合物以较高的总收率合成酮亚砜:将氯甲基苯基亚砜的锂α-亚磺酰基碳负离子加到α,β-烯基醛类中,然后用2,3氧化加成物-dichloro-5,6-dicyano-1,4-benzoquinone或Dess-Martin高碘烷。这些产品依次用氢化钾,叔叔胺处理在一个烧瓶中加入丁基丁基锂和5%的氢氧化钠水溶液,以良好的收率得到具有一碳延伸率的β,γ-烯基羧酸。该方法提供了一种由α,β-链烯基羧酸氯化物和具有一碳延伸率的α,β-链烯基醛合成β,γ-链烯基羧酸的新方法。