Metal-free one-pot α -benzoxylation of benzylic alcohols with acids or aldehydes
作者:Yefu Zhu、Yong Zheng、Weibin Song、Bole Wei、Lijiang Xuan
DOI:10.1016/j.tetlet.2017.12.030
日期:2018.1
A metal-free strategy has been developed for α-benzoxylation of benzylic alcohols with acids or aldehydes. The reaction proceeds via sequential oxidation and α-benzoxylation in one pot. Importantly, the reactions are performed in metal-free condition and utilize cheap aqueous TBHP as an oxidant, affording α-benzoxy ketones in moderate to good yields.
The O<sub>2</sub>-Mediated Cross-Dehydrogenative Coupling: Rose Bengal-Catalyzed Direct Oxidative α-Acyloxylation of Ketones
作者:Yunsheng Zhu、Shengjie Song、Lijun Zheng、Jianjun Li
DOI:10.1021/acs.orglett.3c01741
日期:2023.7.7
the direct oxidative α-acyloxylation of ketones using molecularoxygen as the oxidant is developed. This method avoids the use of excessive peroxides and expensive metal catalysts, affording a variety of α-acyloxylated ketones in satisfactory yields. Experimental studies indicate that the reaction proceeds via a radical pathway. Additionally, α-hydroxy ketones could be obtained by changing the solvent
Bu4NI-catalyzed α-acyloxylation reaction of ethers and ketones with aldehydes and tert-butyl hydroperoxide
作者:Feng Zhu、Zhong-Xia Wang
DOI:10.1016/j.tet.2014.11.002
日期:2014.12
The reaction of (hetero)aromatic aldehydes or cinnamaldehyde with di-/multi-ethers in the presence of Bu4NI and tert-butylhydroperoxide generated corresponding α-acyloxy ethers. Reactions between (hetero)aromatic aldehydes or cyclohexanecarbaldehyde with arylalkyl ketones under similar conditions resulted in α-acyloxy ketones. Collectively, Bu4NI-catalyzed α-acyloxylation reactions exhibit a broad