Quinoline alkaloids. Part 17. Mechanism of base-catalysed rearrangement of hydroxyisopropyldihydrofuroquinolones and of dihydrodimethylpyranoquinolones
作者:Kevin J. James、Michael F. Grundon
DOI:10.1039/p19790001467
日期:——
re-investigation of the stereospecific base-catalysed rearrangement of (+)-(R)-balfourodine (1) and of (+)-(R)isobalfourodine (8) has resulted in improved methods of preparing (+)- and (–)-ψ-balfourodine, in establishing the absolute stereochemistry of the rearrangement products, and in trapping an epoxide intermediate as its methyl ether (9); a new mechanism for rearrangement is proposed.
对(+)-(R)-balfourodine(1)和(+)-(R)异balfourodine(8)的立体特异性碱催化重排的重新研究导致制备(+)-和( - ) - ψ -balfourodine,在建立重排产物的绝对立体化学,而在捕获作为其甲基醚(9)的中间体环氧化物; 提出了一种新的重排机制。