Construction of NH‐Unprotected Spiropyrrolidines and Spiroisoindolines by [4+1] Cyclizations of γ‐Azidoboronic Acids with Cyclic
<i>N</i>
‐Sulfonylhydrazones
作者:Lucía López、María‐Paz Cabal、Carlos Valdés
DOI:10.1002/anie.202113370
日期:2022.1.10
N-sulfonylhydrazones of cyclic ketones are readily transformed into NH-free spirocyclic pyrrolidines and isoindolines by reaction with γ-azidoboronic acids. The transition-metal-free transformation is widely applicable and represents a new disconnection towards spirocyclic pyrrolidines. The application of the reaction in the modification of natural steroids and other biorelevant molecules highlights
通过与 γ-叠氮硼酸反应,环状酮的N-磺酰腙很容易转化为不含 NH 的螺环吡咯烷和异二氢吲哚。不含过渡金属的转变具有广泛的适用性,代表了对螺环吡咯烷的新分离。该反应在修饰天然类固醇和其他生物相关分子中的应用突出了该方法的合成有用性。