Rh 2 (esp) 2 : An Efficient Catalyst for O–H Insertion Reactions of Carboxylic Acids into Acceptor/Acceptor Diazo Compounds (Eur. J. Org. Chem. 13/2016)

The cover picture shows O–H insertion reactions of carboxylic acids into highly stabilized acceptor/acceptor diazo compounds. Rh 2 (esp) 2 acts as an effective catalyst for the decomposition of these stable diazo compounds to form a reactive rhodium carbenoid. The carboxylic acid comes into contact with the reactive rhodium carbenoid and undergoes an O–H insertion reaction to release the Rh catalyst. Rh 2 (esp) 2 now completes its catalytic cycle and is available for the decomposition of another diazo molecule. Details are discussed in the article by I. Sharma et al. on p. 2260 ff .