Abstract
Various compounds with hydroxy group substituted with alkyl and methoxy groups were reacted with lipase, Pseudomonas naeruginosa under ultrasonicirradiation(Sus-4005C, 50W, 40kHz) for 12〜24h to give the corresponding monoacetylated compounds in good yields(ca.60-80%). When no irradiation of ultrasound was done in this reaction, low yield was found in lipase-catalysed acetylation. The effect of irradiation of ultrasound accelerated the acetylation of hydoxyl group of phenoloic or alcoholic compounds.[chemical formula]
