Methylrhenium trioxide as a catalyst for oxidations with molecular oxygen and for oxygen transfer

✍ Scribed by Zuolin Zhu; James H. Espenson

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 643 KB
• Volume: 103
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/1381-1169(95)00120-4

✦ Synopsis

Metbylrhenium trioxide (MTO) was found to be a good catalyst for the oxidation of tertiary phospbines by molecular oxygen at room temperature. Evidence is given that an intermediate Re( V) compound -CH3Re0,, or the adduct CH,ReO, . O=PPh,is involved. The deoxygenation of epoxides, sulfoxides, N-oxides, triphenylarsine oxide and triphenylstibine oxide at room temperature was also catalyzed by MTO, with triphenylphosphine as the oxygen acceptor. A plausible reaction mechanism involves phosphine attack at a compound formed between MT0 and the epoxide or other oxygen-donor compound.