Characterization of NcsB2 as a Promiscuous Naphthoic Acid/Coenzyme A Ligase Integral to the Biosynthesis of the Enediyne Antitumor Antibiotic Neocarzinostatin
作者:Heather A. Cooke、Jian Zhang、Meghan A. Griffin、Koichi Nonaka、Steven G. Van Lanen、Ben Shen、Steven D. Bruner
DOI:10.1021/ja071886a
日期:2007.6.1
The enediyne antitumorantibioticneocarzinostatin (NCS) is produced by Streptomyces carzinostaticus ATCC15944. The biosynthetic pathway for the naphthoic acid moiety (boxed) of the NCSchromophore (1) is proposed to comprise five enzymes: NcsB, NcsB1, NcsB2, NcsB3, NcsB4. Both in vivo and in vitro experiments were used to support the proposed pathway. NcsB2 was characterized for the ability to catalyze
Method for the Rapid Synthesis of Highly Functionalized 2-Hydroxy-1-naphthoates. Syntheses of the Naphthoic Acid Components of Neocarzinostatin Chromophore and N1999A2
作者:Nan Ji、Brad M. Rosen、Andrew G. Myers
DOI:10.1021/ol048075l
日期:2004.11.1
describe a four-step sequence for the synthesis of complex 2-hydroxy-1-naphthoic acids involving Z-selective olefination of benzaldehyde derivatives with a novel dioxolenone-containing phenyl phosphonate reagent, followed by dioxolenone cleavage with alkaline trifluoroethanol and oxidative cyclization (Mn(OAc)(3)) of the resultant trifluoroethyl beta-keto esters. [reaction: see text]