Biotransformations of 20-hydroxyecdysone and analogues by Curvularia lunata NRRL 2178
作者:Chatchawan Changtam、Oratai Sukcharoen、Boon-ek Yingyongnarongkul、Apichart Suksamrarn
DOI:10.1016/j.steroids.2006.06.002
日期:2006.10
20-Hydroxyecdysone, the arthropod moulting hormone, was biotransformed by the fungus Curvularia lunata NRRL 2178 to the rare ecdysteroid, 2-dehydro-3-epi-20-hydroxyecdysone, and the novel 3 alpha,9 alpha-cyclo ecdysteroid analogue, (20R,22R)-3 beta,14 alpha,20,22,25-pentahydroxy-3 alpha,9 alpha-cyclo-5 beta-cholest-7-en-2,6-dione in 14 and 44% yields, respectively. Ponasterone A and pterosterone were similarly biotransformed to the corresponding 2-dehydro-3-epi- and 3 alpha,9 alpha-cyclo-analogues. (c) 2006 Elsevier Inc. All rights reserved.