CO bond formation between terminal alkenes/benzyl alcohols as an arylcarboxy surrogate and carbonyl compounds in a biodegradable deep eutectic solvent (DES) based on choline chloride and urea was performed. By employment of TBAI as catalyst and TBHP as oxidant, various derivatives of carbonyl compounds were benzylated in α position in good to high yield at 90 °C. Moreover, α-oxybenzoylation of diethyl
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.
NBS/DBU mediated one-pot synthesis of α-acyloxyketones from benzylic secondary alcohols and carboxylic acids
作者:Minghui Zhu、Wei Wei、Daoshan Yang、Hong Cui、Huanhuan Cui、Xuejun Sun、Hua Wang
DOI:10.1039/c6ob02173e
日期:——
A simple and efficient one-pot NBS/DBU-mediated method has been developed for the synthesis of α-acyloxyketones from various benzylic secondary alcohols and carboxylic acids. Through this methodology, a series of α-acyloxyketones could be obtained in good to excellent yields under mild conditions. Importantly, this new reaction avoids the direct usage of toxic metal catalysts or potentially dangerous