NO+‐initiated semipinacol rearrangement and subsequent proton elimination. The procedure enabled the rapid construction of a series of oximes and oxime ethers with spiro quaternary stereocenters from allylic silyl ethers. Additional features of this reaction include wide substrate tolerance as well as the commercial availability of the safe nitrosation reagent NOBF4. The key N‐heterotricyclic cores of three natural
在NO +引发的半松果醇重排和随后的质子消除的基础上,开发了一种有效的
肟化方法。该方法使得能够从烯丙基甲
硅烷基醚快速构建一系列具有螺旋四元立体中心的
肟和
肟醚。该反应的其他特征包括广泛的底物耐受性以及安全的亚硝化试剂NOBF 4的市售性。通过这种方法,还可以有效地构建三种天然
生物碱的主要N-杂环
三环核心,即结核菌
甾醇B,(+)-quebrachidine和
杀虫剂。