Selective C–H Allylic Oxygenation of Cycloalkenes and Terpenoids Photosensitized by [Cu(Xantphos)(neoc)]BF<sub>4</sub>
作者:Michael G. Kallitsakis、Dimitra K. Gioftsidou、Marina A. Tzani、Panagiotis A. Angaridis、Michael A. Terzidis、Ioannis N. Lykakis
DOI:10.1021/acs.joc.1c01591
日期:2021.10.1
We present herein for the first time the use of the [Cu(Xantphos)(neoc)]BF4 as a photocatalyst for the selective C–H allylic oxygenation of cycloalkenes into the corresponding allylic hydroperoxides or alcohols in the presence of molecular oxygen. The proposed methodology affords the products at good yields and has also been applied successfully to several bioactive terpenoids, such as geraniol, linalool
我们在此首次提出使用 [Cu(Xantphos)(neoc)]BF 4作为光催化剂,在分子氧存在下将环烯烃选择性 C-H 烯丙基氧化成相应的烯丙基氢过氧化物或醇。所提出的方法以良好的产量提供了产品,并且还成功地应用于几种生物活性萜类化合物,如香叶醇、芳樟醇、β-香茅醇和植醇。一项还涉及动力学同位素效应 (KIE) 的机械研究支持所提出的单线态氧介导的反应。基于观察到的高化学选择性和产率以及快速和清洁的反应过程,本催化体系 [Cu(Xantphos)(neoc)]BF 4也已应用于实验室规模的合成顺式玫瑰氧化物,一种众所周知的香料成分,用于玫瑰和天竺葵香水。