Lipase-catalyzed resolution of 5-acetoxy-1,2-dihydroxy-1,2,3,4-tetrahydronaphthalene. Application to the synthesis of (+)-(3R,4S)-cis-4-hydroxy-6-deoxyscytalone, a metabolite isolated from Colletotrichum acutatum
Asymmetric Synthesis of Natural <i>cis</i>-Dihydroarenediols Using Tetrahydroxynaphthalene Reductase and Its Biosynthetic Implications
作者:Nirmal Saha、Michael Müller、Syed Masood Husain
DOI:10.1021/acs.orglett.9b00500
日期:2019.4.5
Asymmetric reduction of hydroxynaphthoquinones to secondary metabolites, (3S,4R)-3,4,8- and (2S,4R)-2,4,8-trihydroxy-1-tetralone, a putative biosynthetic diketo intermediate and a probable natural analogue, (3S,4R)-7-acetyl-3,4,8-trihydroxy-6-methyl-3,4-dihydronaphthalene-1(2H)-one, using NADPH-dependent tetrahydroxynaphthalene reductase (T4HNR) of Magnaporthe grisea is described. This work implies
We describe here a direct access to (4S)-isosclerone (+)-1, an important structural component of several natural products featuring a spirobisnaphthalene ring system. Starting with the commercially available 5-hydroxy-1,4-naphthalenedione (juglone), biotransformation by the isosclerone-producing endophytic fungus Paraconiothyrium variabile is described. The absolute configuration of (+)-1 was determined unambiguously using circular dichroism and by measurement of the optical rotation. Moreover, the bio-transformations of other naphthalene derivatives were undertaken and led to the corresponding (4S)-hydroxy-l-tetralone. At last, this work brings some insights on the biosynthesis of natural tetralones. (C) 2012 Elsevier Ltd. All rights reserved.