| 摘要 |
A method for producing butyrolactones of general formula (I), wherein the substituents R<1> and R<2> stand for hydrogen, alkyl, aryl hydroxyalkyl or optionally substituted aryl and trialkylsilyl groups, by reacting alkynes of general formula (II) R<1>-CC-R<2>, wherein R<1> and R<2> have the above-mentioned meaning, with carbon monoxide and water in the presence of a rhodium catalyst at pressures ranging from 20 to 300 bars and by hydrogenation of intermediately formed and as yet non-hydrogenated 2(5H) furanones. According to the inventive method a) the reaction carbonylation mixture is reacted with hydrogen at temperatures of 150-250 DEG C and at pressures ranging between 100 and 300 bars, b) the precipitated catalyst is separated and returned to the cabonylation reaction and c) butyrolactone is obtained from the de-catalysed reaction mixture by means of distillation.
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