Kirmse-Doyle- and Stevens-Type Rearrangements of Glutarate-Derived Oxonium Ylides
作者:Benedikt Skrobo、Nils E. Schlörer、Jörg-M. Neudörfl、Jan Deska
DOI:10.1002/chem.201704624
日期:2018.3.2
tetrahydrofuran building blocks. Here, the lipase‐catalyzed desymmetrization of 3‐alkoxyglutarates renders highly enantioenriched carboxylic acid intermediates, whose subsequent activation and oxonium ylide rearrangement by means of rhodium or copper complexes furnishes functionalized O‐heterocycles with excellent diastereoselectivity. The two‐step protocol offers a streamlined and flexible synthesis of tetrahydrofuranones
一种新颖的化学酶促合成级联反应能够制备致密装饰的四氢呋喃结构单元。在这里,脂肪酶催化的3-烷氧基戊二酸酯的脱对称化作用产生了高度对映体富集的羧酸中间体,其随后的活化和铑铑或铜配合物对叶立德的重排提供了出色的非对映选择性,使官能化的O-杂环成为可能。两步操作规程可简化并灵活地合成带有不同苄基,烯丙基或烯丙基侧链的四氢呋喃酮,并能完全控制多个立体异构中心。