Reduction with 2-Propanol over Hydrous Tin(IV) Oxide

The reduction with 2-propanol as a hydrogen source over hydrous tin(IV) oxide has proved to be successful. Hydrous tin(IV) oxide was prepared from stannic(IV) chloride by precipitation with aqueous ammonia, followed by drying and calcination at 300 °C for 5 h. The specific surface area was 150 m2 g−1. The reductions were carried out in the vapor phase at temperatures of from 300 to 330 °C. The reduction of aliphatic carboxylic acids gives the corresponding alcohols. Aromatic carboxylic acids and their derivatives were further reduced, and the corresponding hydrocarbons were obtained. The reductions of aromatic ketones and the derivatives of benzyl alcohol also gave hydrocarbons. In the reaction of alkyl halides, reductive dehalogenation proceeded and the corresponding hydrocarbon was produced.