Air-stable zirconocene bis(perfluorobutanesulfonate) as a highly efficient catalyst for synthesis of 伪-aminophosphonates via Kabachnik-Fields reaction under solvent-free condition

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• 作者：Ningbo Li ; Xie Wang ; Renhua Qiu ; Xinhua Xu ; Jinyang Chen ; Xiaohong Zhang ; Sihai Chen ; Shuangfeng Yin
• 关键词：Zirconocene ; Perfluorobutanesulfonate ; Lewis acid ; Kabachnik&ndash ; Fields reaction ; 伪-Aminophosphonates
• 刊名：Catalysis Communications
• 出版年：5 January, 2014
• 年：2014
• 卷：43
• 期：Complete
• 页码：184-187
• 全文大小：331 K

文摘

Zirconocene bis(perfluorobutanesulfonate) [Cp₂Zr(OSO₂C₄F₉)₂路2H₂O] was successfully synthesized by treatment of Cp₂ZrCl₂ with C₄F₉SO₃Ag, and was found to have the nature of air-stability, water tolerance, high thermal stability and strong Lewis acidity. This complex showed high catalytic efficiency for the synthesis of 伪-aminophosphonates via Kabachnik-Fields reaction of aldehydes/ketones, amines and diethyl phosphite under mild and solvent-free conditions. Furthermore, it can be reused without loss of activity in a test of five cycles. Compared with our previously reported complex of Cp₂Zr(OSO₂C₈F₁₇)₂路3H₂O路THF, this complex showed better catalytic activity.