Deprotection of Acetals and Silyl Ethers by DDQ. Is DDQ a Neutral Catalyst?
作者:Akira Oku、Motoharu Kinugasa、Tohru Kamada
DOI:10.1246/cl.1993.165
日期:1993.1
2,3-Dichloro-5,6-dicyano-p-benzoquinone (DDQ) in wet ethyl acetate at room temperature catalytically hydrolyzed acyclic acetals effectively and selectively among ethereal functional groups such as dioxoranes, 1,3-dioxanes, oxiranes, TMS- and TBDMS ethers. The mechanism is discussed on the basis of the function of DDQ as a Lewis acid in a wet solvent.
2,3-二氯-5,6-二氰基对苯醌(DDQ)在室温下的湿乙酸乙酯中,能够有效且选择性地催化水解无环醛醚,针对诸如二氧杂烷、1,3-二氧杂烷、环氧烷、TMS和TBDMS醚等醚类功能团。机制的讨论基于DDQ作为路易斯酸在湿溶剂中的作用。