Investigating the Initial Steps in the Biosynthesis of Cyanobacterial Sunscreen Scytonemin
作者:Emily P. Balskus、Christopher T. Walsh
DOI:10.1021/ja807192u
日期:2008.11.19
(1) functions as a sunscreen, absorbing harmful UV-A radiation. Using information from a recently identified gene cluster, we propose a biosynthetic route to this pigment. We also report the characterization of two enzymes, NpR1275 and NpR1276, which are involved in the initial stages of this pathway. A regioselective acyloin reaction between indole-3-pyruvic acid (4) and p-hydroxyphenylpyruvic acid
Biomimetic total syntheses of spirobacillenes A and B
作者:Hongzhi Yang、Juan Feng、Yefeng Tang
DOI:10.1039/c3cc42686f
日期:——
The first totalsyntheses of spirobacillenes A and B were achieved concisely. The key transformation leading to spirobacillene A features a biomimetic intramolecular phenol-enol oxidative coupling reaction, and that leading to spirobacillene B highlights a bio-inspired intramolecular indole-ketone enolate oxidative coupling reaction.