Cycling through: Type I cyclohexenes are produced with high margins of stereoselectivity by chiral, catalyst‐controlled, Diels–Alder reactions between 1‐hydrazinodienes and N‐acryloyl oxazolidinone dienophiles, and readily transformed to cyclohexenes III via a putative, transient allylic diazene II (see scheme). This chemistry gives access to functionalized cyclohexenes that can be difficult to construct
循环:I型
环己烯通过手性的、催化剂控制的、1-
肼二烯和N-
丙烯酰基
恶唑烷酮亲二烯体之间的Diels-Alder反应产生具有高立体选择性,并通过假定的瞬态烯丙基
二氮烯II容易地转化为
环己烯III(见方案)。这种
化学反应提供了难以通过替代方法构建的官能化
环己烯。