| 摘要 |
<p>An aluminum compounds represented by the following general formula (1): Al(R<1>-SO3)l(R<2>)m(R<3>)n wherein R<1> is a hydrocarbon group which may be substituted, R<2> is a hydrocarbon group which may be substituted, an aliphatic hydrocarbonoxy group which may be substituted, or a halogen atom, R<3> is an aromatic hydrocarbonoxy group which may be substituted, and l, m and n are independently a number of 0 to 3, with the proviso that l + m + n equals 3, and l is not 0, an acid catalyst comprising the aluminum compound, and a process for producing an ester, acetal, ketal, ether or alkyl glycoside making use of the catalyst. The catalyst is suitable for use in a variety of acid-catalyzed reactions of alcohols, i.e., reactions with carbonyl compounds, such as esterification, transesterification, acetalization and ketalization, etherification, ring-opening reactions of epoxy compounds, etc. in addition to the above-described respective reactions, is not deactivated by alcoholysis, has a sufficient activity, can easily control a reaction catalyzed thereby and scarcely causes side reactions. Consequently, the use of the catalyst permits the production of the intended product at a high yield from starting materials used in an almost equimolar proportion.</p> |
