Synthesis of stable Δ4-isoxazolines by 1,3-dipolar cycloaddition of 3,4-dihydroisoquinoline N-oxides with alkynes and their rearrangement to isoquinoline-fused pyrroles
作者:Bao-Xiang Zhao、Yang Yu、Shoji Eguchi
DOI:10.1016/0040-4020(96)00698-9
日期:1996.9
Novel stable 4-substituted Δ4-isoxazoline derivatives were obtained by cycloaddition reaction of isoquinoline N-oxides with alkynes. The thermal reaction of some 4-isoxazoline derivatives leading to isoquinoline-fused pyrroles was investigated and it was found that the pathway of the rearrangement to pyrroles is consistent with the way involving acylaziridine.
新颖稳定的4-取代的Δ 4由异喹啉N-氧化物与炔烃的环加成反应制得-isoxazoline衍生物。研究了一些4-异恶唑啉衍生物的热反应,生成异喹啉稠合的吡咯,发现重排成吡咯的途径与酰基吡唑烷的方式一致。