A platinum(II) pincer complex composed of two six-membered fused metallacycles was directly synthesized using 1,3-bis(2-pyridyloxy)benzene and K2PtCl4. The structure of the complex was elucidated via NMR and X-ray crystallography analysis. The stable complex was formed due to the six-membered fused cycle structure around the Pt(II) center which reduced the bond angle strain. The complex was applied to the silylcyanation reaction of aldehydes and imines and showed an efficient catalytic activity with 99% yield.

본 연구에서는 1,3-bis(2-pyridyloxy)benzene과 K2PtCl4를 이용하여 백금을 중심으로 2개의 6원환을 이루는 백금 핀서화합물을 합성하였다. NMR과 X-ray를 이용하여 구조를 규명하였고 백금원자를 중심으로 이루는 6원환 구조는 angle strain을 감소시켜 안정한 화합물을 형성하였다. 이 화합물을 알데하이드와 이민의 silylcyanation 반응에 적용하여 본결과 수율 99%까지 나타내는 효과적인 촉매작용을 보여주었다.