A structure‐activity relationship (SAR) study of bastadin6 (1), a brominated tyrosine‐derivedmetabolitefrom Indonesian marinesponge having a potent anti‐angiogenic activity, was executed. The syntheses and their biological evaluation of the oxime‐modified analogues and bromine‐modified analogues revealed that both the oxime moieties and bromine atoms in bastadin6 (1) play an important role to
作者:Zhi-wei Guo、Koji Machiya、Grzegorz M. Salamonczyk、Charles J. Sih
DOI:10.1021/jo9721204
日期:1998.6.1
A chemoenzymatic strategy has been developed for the synthesis of bastadins 2, 3, and 6. The requisite dimeric dityrosine and isodityrosine building blocks were successfully prepared by oxidative C-C and C-O phenolic coupling of mono- and dihalogenated derivatives of tyrosine and tyramine using horseradish and soybean peroxidases. By carefully controlling the experimental parameters, the requisite synthons may now be prepared in synthetically useful yields without the exhaustive protection and deprotection of the sensitive functional groups.