Mechanistic Studies on the 1,2-Spin-Center Shift in Carbohydrate Systems with a Fluorenylcyclopropyl Radical Clock
作者:Collin H. Witt、K. A. Woerpel
DOI:10.1021/acs.joc.3c01069
日期:2023.9.1
carbohydrate systems was studied with a fluorenylcyclopropyl radical clock. The 1,2-rearrangement of the acyl fluorenylcyclopropane group without opening of the cyclopropane ring provides the strongest evidence that the 1,2-spin-center shift in carbohydrate systems occurs through a concerted transition state without the intermediacy of a 1,3-dioxolanyl radical.
用芴基环丙基自由基时钟研究了碳水化合物系统中 1,2-自旋中心转移的机制。酰基芴基环丙烷基团在不打开环丙烷环的情况下进行 1,2-重排提供了最有力的证据,证明碳水化合物系统中的 1,2-自旋中心转移是通过协调的过渡态发生的,而无需 1,3-二氧戊环的中介激进的。