作者:Leonardo Di Nunno、Antonio Scilimati、Paola Vitale
DOI:10.1016/j.tet.2005.01.049
日期:2005.3
Alkyllithiums react with 3-phenylisoxazole giving C5–H abstraction followed either mainly by ring fragmentation to benzonitrile and ethynolate ion (in the case of t-BuLi) or (less hindered alkyllithiums: n-BuLi, EtLi, MeLi) also by formation of alkylated enaminones. Appreciable amounts of 2-alkyl-4,6-diphenylpyrimidines have also been isolated for certain alkyllithiums (EtLi and MeLi). This is at variance
烷基锂与3-苯基异恶唑反应生成C 5 -H原子,然后主要通过环断裂成苄腈和乙炔离子(对于t- BuLi)或(受阻较小的烷基锂:n- BuLi,EtLi,MeLi)也可以通过形成烷基化的烯胺酮。对于某些烷基锂(EtLi和MeLi),也已分离出适量的2-烷基-4,6-二苯基嘧啶。这与所报道的受阻锂酰胺(LTMP)的行为不同,该文献仅描述了C 5 -H的抽象然后环的断裂。讨论了观察结果的机械意义。