The Coupling of Tertiary Amines with Acrylate Derivatives via Visible-Light Photoredox Catalysis
作者:Xiaojun Dai、Dongping Cheng、Baochuan Guan、Wenjuan Mao、Xiaoliang Xu、Xiaonian Li
DOI:10.1021/jo501097b
日期:2014.8.1
Catalyzed by Ru(bpy)3(BF4)2, the photoredox coupling of tertiary amines with acrylate derivatives including Baylis–Hillman adducts under visible light irradiation was successfully established. The scope of the substrates was broad, and thus an array of γ-aminobutyric ester derivatives was obtained in moderate to good yields.
and Ru(II)‐catalysed C(sp3)−H insertions differs considerably from that typically proposed for the Rh(II)‐catalysed transformation. Whereas the Pd(0)‐catalysed reaction involves a Pd‐mediated 1,5‐H migration from the C(sp3)−H bond to the carbenoid carbon atom leading to the formal oxidation of the transition metal, a Ru(II)‐promoted Mannich type reaction involving a zwitterionic intermediate seems to