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Reduction of Nitroarenes with Platinum-Encapsulating Polysiloxane Gels
Y. Motoyama, K. Kamo, H. Nagashima*
Kyushu University, Kasuga, Japan
25 May 2009 (online)
A platinum-encapsulating polysiloxane gel ([Pt]@SiC6) was prepared by treatment of PMHS with 1,5-hexadiene in the presence of Karstedt’s catalyst in THP (eq. 1). [Pt]@SiC6 catalyzed the hydrogenation of various nitro compounds under 10 atm of H2 at room temperature to afford the corresponding amines in up to >99% yield (13 examples, eq. 2). In the hydrogenation of 4-nitroanisole, the catalyst was recovered by simple filtration and reused five times without significant loss of catalytic activity.