253 28 28 4 5 K. Madhava Madyastha N. S. R. Krishna Murthy Bio-Organic Section, Department of Organic Chemistry Indian Institute of Science 560012 Bangalore India Summary Incubation of acetates of geraniol, citronellol and linalool with Aspergillus niger resulted in their hydrolysis to corresponding alcohols which were further hydroxylated to their respective 8-hydroxy derivatives. In the case of linalyl acetate, besides linalool and 8-hydroxylinalool, small amounts of geraniol and α-terpineol were also formed. Microsomes (105 000xg sediment) prepared from induced cells of A. niger were found to convert (1- 3 H)citronellol to 8-hydroxy citronellol in the presence of NADPH and O 2 . The pH optimum for the hydroxylase was found to be 7.6.
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