作者:Wim Aelterman、Norbert De Kimpe、Jean-Paul Declercq
DOI:10.1021/jo970342w
日期:1998.1.1
A short synthesis of appropriately substituted 3,3-dichloroazetidines, a virtually unknown class of azetidines, is described. The reaction of 3,3-dichloro-1-azaallylic carbanions, generated from N-(1-aryl-2,2-dichloroethylidene)amines, with aromatic aldehydes produced alpha,alpha-dichloro-beta-hydroxy imines that, upon treatment with mesyl chloride, were converted into the corresponding beta-(mesyloxy)
描述了适当取代的3,3-二氯氮杂环丁烷的短合成,这实际上是一类未知的氮杂环丁烷。由N-(1-芳基-2,2-二氯乙叉基)胺生成的3,3-二氯-1-氮杂烯丙基碳负离子与芳族醛的反应产生了α,α-二氯-β-羟基亚胺,经处理后甲磺酰氯被转化为相应的β-(甲磺酰氧基)亚胺。这些α,α-二氯-β-(甲磺酰氧基)酮亚胺与氰化钾或硼氢化钠在甲醇中的反应以立体选择性方式提供了各种2-氰基和2-甲氧基-3,3-二氯氮杂环丁烷。用氰基硼氢化钠还原β-(甲氧基)亚胺,然后在DMSO中用碳酸钾环化,也得到3,3-二氯氮杂环丁烷。