Stereospecific incorporation of hydrogen from reduced nicotinamide adenine dinucleotide phosphate in hydrogenation of (-)-dehydrogriseofulvin to (+)-griseofulvin by a partially purified enzyme system of Streptomyces cinereocrocatus.
Stereospecific incorporation of hydrogen from reduced nicotinamide adenine dinucleotide phosphate in hydrogenation of (-)-dehydrogriseofulvin to (+)-griseofulvin by a partially purified enzyme system of Streptomyces cinereocrocatus.
作者:TAIKO ODA、YOSHIHIRO SATO
DOI:10.1248/cpb.34.4635
日期:——
The stereochemistry of reduced nicotinamide adenine dinucleotide phosphate (NADPH)-dependent hydrogenation was investigated by the conversion of (-)-dehydrogriseofulvin (1) to (+)-griseofulvin (2a) by the use of a partially purified enzyme system of Streptomyces cinereocrocatus in the presence of (4R)- or (4S)-[4-2H1]NADPH. The results of 270MHz proton nuclear magnetic resonance spectroscopy indicated that the origin of the 6'α-hydrogen of 2a is a hydride ion donated by pro-4R-hydrogen of NADPH.