Pd-catalyzed heteroannulation of isoxazoles: Convergent synthesis of isoxazolo[5,4-c]quinolines
作者:Ekaterina E. Galenko、Timur O. Zanakhov、Mikhail S. Novikov、Alexander F. Khlebnikov
DOI:10.1016/j.tetlet.2022.154270
日期:2023.1
Variously substituted isoxazolo[5,4-c]quinolines can be easily prepared in high yields by Pd-catalyzed heteroannulation of 5-carbonyl-4-haloisoxazoles with 2-aminophenylboronic acid derivatives. 4-Unsubstituted isoxazolo[5,4-c]quinolines can be readily modified at C4 via a chlorination/substitution sequence.
通过 Pd 催化的 5-羰基-4-卤代异恶唑与 2-氨基苯基硼酸衍生物的杂环化,可以很容易地以高产率制备各种取代的异恶唑并 [5,4- c ] 喹啉。4-未取代的异恶唑并 [5,4- c ] 喹啉可以很容易地通过氯化/取代顺序在 C4 处进行修饰。