Functionalized methyl cis-4-oxoalk-2-enoates 2 are synthesized in a one-pot procedure by singlet oxygen oxygenation of the corresponding 2-methoxyfurans 1 in methanol and reduction of the resulting hydroperoxides 4 and 5 by the sulfides 6 which are selectively oxidized into the sulfoxides 7. The synthetic method has a wide range of applicability and affords compounds 2 stereoselectively and in good yields; concomitantly the sulfoxides 7 are obtained in excellent yields.
Catalyzed by Ir(dFCF(3)ppy)(2)(dtbbpy)PF6, several aroyl methylidenemalonates were synthesized in good to excellent yields via visible light photoredox-catalyzed the oxidative ring-opening of cyclopropenyl carboxylate derivatives. The possible mechanism of oxidative quenching cycle was proposed. (C) 2018 Published by Elsevier Ltd.
Iesce, M. Rosaria; Cermola, Flavio; Guitto, Antonio, Journal of the Chemical Society. Perkin transactions I, 1999, # 4, p. 475 - 478
作者:Iesce, M. Rosaria、Cermola, Flavio、Guitto, Antonio、Giordano, Federico