Formation of bromohydrins and epoxides from 4-hydroxy-2-oxabicyclo[3.3.0]oct-7-en-3-one and 9-hydroxy-7-oxabicyclo[4.3.0] non-4-en-8-one
作者:Antonio Garofalo、Michael B. Hursthouse、K. M. Abdul Malik、Horacio F. Olivo、Stanley M. Roberts、Vladimir Sik
DOI:10.1039/p19940001311
日期:——
The hydroxy lactone 1 and the silylated derivative 8 react selectively with HOBr to give access to polyfunctional bicyclic systems such as the bromo ester 10. The lactone 3 or the corresponding derivative 20 react less selectively to give mixtures of compounds 16, 17, 18, 19, 21, 22. The hydroxybicyclo[4.3.0]nonenones 2 and 4 behave in a similar fashion to the lactone 3, reacting non-selectively with
羟基内酯1和甲硅烷基化衍生物8与HOBr选择性反应,可进入多官能双环系统,如溴酸酯10。内酯3或相应的衍生物20反应更少选择性,得到的化合物的混合物16,17,18,19,21,22。羟基双环[4.3.0]壬烯酮2和4的行为与内酯3相似,与HOBr和m发生非选择性反应氯过苯甲酸,以产生化合物双环取代的高度过多23 - 31,33 - 39,41和42。对于四种化合物,二乙酸酯25和37以及环氧化物26和27,获得了X射线晶体结构。