Convenient Route to Both Enantiomerically Pure Forms of<i>trans</i>-4,5-Dihydroxy-2-cyclopenten-1-one: Efficient Synthesis of the Neocarzinostatin Chromophore Core
作者:Koji Toyama、Satoru Iguchi、Hayato Sakazaki、Tohru Oishi、Masahiro Hirama
DOI:10.1246/bcsj.74.997
日期:2001.6
An enantioselective synthesis of an epoxybicyclo[7.3.0]dodecenediyne core system of the neocarzinostatin chromophore has been achieved via intramolecular acetylide addition and palladium-mediated coupling of iodocyclopentene 5 with alkyne 6. The key cyclopentene moiety, trans-4,5-dihydroxy-2-cyclopenten-1-one 7, was conveniently prepared in both enantiomerically pure forms via enzymatic desymmetrization
通过分子内乙炔加成和钯介导的碘环戊烯 5 与炔烃 6 偶联,实现了新制癌素发色团的环氧双环 [7.3.0] 十二烯二炔核心系统的对映选择性合成。 关键的环戊烯部分,反式-4,5-二羟基-通过内消旋-3,4,5-反式,反式-三羟基环戊烯衍生物的酶促去对称化,可以方便地以两种对映体纯形式制备2-cyclopenten-1-one 7。