Mitsuru Yamamoto and Seijiro Matsubaraà Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoutodaigaku-katsura, Nishikyo-ku, Kyoto 615-8510 ... (Received November 16, 2006; CL-061346; E-mail: matsubar@orgrxn.mbox.media.kyoto-u.ac.jp) ... Treatment of 1-aminobiphenyl and diphenylamine with catalytic amount of Pt/C in hydrothermal water (250 C, 4MPa) affords 9H-carbazole in good yield. In this catalytic cycle, water works as ...