作者:Peter Metz、Sandra Karsch、Dirk Freitag、Pia Schwab
DOI:10.1055/s-2004-822408
日期:——
synthesized by ring closing metathesis (RCM) of sulfonates. The resulting α,β-unsaturated sultones act as dienophiles in intermolecular Diels-Alder reactions. A first cyclic sulfate formation through RCM has been discovered, and a rapid access to p-lactams fused to a sultam moiety of variable ring size was developed from inexpensive, commercially available starting materials using RCM as the key operation
通过磺酸盐的闭环复分解(RCM)有效地合成了具有正常、中等和大环尺寸的不饱和磺内酯。所得的 α,β-不饱和磺内酯在分子间 Diels-Alder 反应中充当亲双烯体。已经发现了通过 RCM 形成的第一个环状硫酸盐,并且使用 RCM 作为关键操作,从廉价的、可商购的起始材料开发了一种快速获得稠合到可变环大小的磺胺部分的 p-内酰胺的方法。还描述了一种有效的 4-vinyl-azetidin-2-ones 生成 1-aza-bicyclo[4.2.0]oct-4-en-8-ones 的 RCM。