Efficient nucleophilic substitution reactions of quinolyl and isoquinolyl halides with nucleophiles under focused microwave irradiation
作者:Yie-Jia Cherng
DOI:10.1016/s0040-4020(01)01225-x
日期:2002.2
Nucleophilic substitutionreactions of 2-chloroquinoline, 3-bromoquinoline and 4-bromoisoquinoline with thiolate, alkoxy ions and aniline were completed within several minutes undermicrowaveirradiation. This method gives the desired products with yields up to 99% in a short reaction time, and is superior to the classical heating process.
2-, 3- and 4-Bromoquinolines, were converted to the corresponding lithium tri(quinolinyl)magnesates at -10degreesC when exposed to Bu3MgLi in THF. The resulting organomagnesium derivatives were quenched with various electrophiles or involved in metal-catalyzed coupling reactions with heteroaryl halides to afford functionalized quinolines. (C) 2003 Elsevier Ltd. All rights reserved.
Complex base-induced generation of 3,4-dehydroquinoline: a new access to quinoline derivatives
3,4-Dehydroquinoline was easily generated from 3-bromoquinoline and a complex base NaNH2-tBuONa. Nucleophilic condensation of amines and thiolates were performed in good yields. (C) 2001 Elsevier Science Ltd. All rights reserved.