Stereoselectivities of benzonitrile oxide cycloadditions to disubstituted cyclopentenes and dihydrofurans
作者:P. Caramella、F.Marinone Albini、D. Vitali、Nelson G. Rondan、Yun-Dong Wu、Timothy R. Schwartz、K.N. Houk
DOI:10.1016/s0040-4039(01)90064-4
日期:1984.1
Benzonitrile oxide cycloadds preferentially anti to the substituents of cis-3,5-di-X-cyclopentenes, where X = OMe, OAc, OCOPh, Br, Cl, and OH. Higher stereoselectivities are found for cis-2,5-di-X-2,5-dihydrofurans. The origins of these selectivities, and contrasts with acyclic and cyclobutene analogs, are described.
氧化苯甲腈环优先与顺式3,5-二-X-环戊烯的取代基抗衡,其中X = OMe,OAc,OCOPh,Br,Cl和OH。发现对顺式2,5-二-X-2,5-二氢呋喃具有更高的立体选择性。描述了这些选择性的起源,以及与无环和环丁烯类似物的对比。