Efficient photocatalytic C-3 thiocyanation of indoles over tetraphenylsilane-based porous aromatic frameworks
Yuxuan He1, Linzhu Cao1, He Wang1
1Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China. cuifc705@nenu.edu.cn.
Abstract:
The rational design and synthesis of donor-π-acceptor (D-π-A) type tetraphenylsilane (TEPS)-based PAFs (PAF-403, PAF-404, and PAF-405) linked by acetylene bridges are presented. Among them, PAF-405 displays the highest efficiency for visible-light-induced C-3 thiocyanation of indoles (up to 99% yield) with broad substrate scope (15 examples), which could be recycled for five cycles with a slight loss of catalytic activity. A possible structure-performance correlation of TEPS-PAFs is proposed.
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