Catalytic Ring Opening of α-Epoxyketones Using DDQ in Methanol Solution at Room Temperature and under Reflux Conditions in Excellent Yields
作者:Hamid R. Memarian、Ali Saffar-Teluri、Mohsen Khosravi-Babadi
DOI:10.1515/znb-2007-0805
日期:2007.8.1
Catalytic ring opening reactions of α-epoxyketones by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) in methanol solution at r. t. and under reflux conditions resulted in the formation of α-hydroxy-β -methoxyketones through Cβ -O bond cleavage in excellent yields.Whereas the type and nature of the additional substituent affects the rate of ring opening, the effect of temperature has an extreme influence
在室温和回流条件下,2,3-二氯-5,6-二氰基-1,4-苯醌(DDQ)在甲醇溶液中的α-环氧酮催化开环反应导致形成α-羟基-β-甲氧基酮通过 Cβ -O 键裂解,产率极好。另外取代基的类型和性质会影响开环速率,而温度的影响对反应速率有极大的影响。DDQ 在 15 °C 和 33 °C 下的循环伏安研究支持 DDQ 的电子受体能力随着温度的升高而增加。