Carbon-Sulfur and Carbon-Selenium Double Bond Formation Through Thiolysis and Selenolysis of 4-Methylsulfanyl-Substituted Pyridinium and Quinolinium Halides
作者:Jocelyne Levillain、Daniel Paquer、Aboubacary Sene、Michel Vazeux
DOI:10.1055/s-1998-2002
日期:1998.1
4-Methylsulfanylpyridinium and -quinolinium salts 3 and 4 with alkyl groups such as methyl, allyl, benzyl, ethoxycarbonylmethyl, benzoylmethyl on the nitrogen atom were prepared by the Menschutkin-type reaction and some of them caused to react under either the thiolysis or selenolysis reaction conditions. N-Substituted pyridine-4-thiones 5 a - c and quinoline-4-thiones 6 a - e were formed at different rates in high isolated yield. On the other hand, two N-alkyl-4-selenopyridones 7 a,b together with three 4-selenoquinolones, 8 a,b,c were also produced in high chemical purity and characterized spectroscopically. In addition, 4, sulfanylpyridone 12 and 4-selenopyridone 13 with a N-tert-butyl group were obtained via Zincke's salt 9. The overall process provides a useful alternative to the otherwise difficult direct N-alkylation of thioxo- and selenoxopyridine systems.
通过Menschutkin型反应制备了氮原子上带有甲基、烯丙基、苄基、乙氧羰基甲基、苯甲酰甲基等烷基的4-甲硫基吡啶鎓和喹啉鎓盐3和4,其中一些在硫解或硒解反应条件下发生反应。N-取代吡啶-4-硫酮5a-c和喹啉-4-硫酮6a-e以不同的速率形成,且分离收率很高。另一方面,两种N-烷基-4-硒代吡啶酮7a,b和三种4-硒代喹啉酮8a,b,c也以高化学纯度制备,并通过光谱学表征。此外,通过Zincke盐9获得了带有N-叔丁基的4-硫代吡啶酮12和4-硒代吡啶酮13。整个过程为硫代吡啶和硒代吡啶系统的直接N-烷基化提供了有用的替代方案。