Biomimetic Formation of 2-Tropolones by Dioxygenase-Catalysed Ring Expansion of Substituted 2,4-Cyclohexadienones
作者:Meite Xin、Timothy D. H. Bugg
DOI:10.1002/cbic.200900631
日期:2010.1.25
sixes and sevens: We have demonstrated experimentally the proposed ring expansion in the biosynthesis of substituted 2‐tropolones. Treatment of four cyclohexa‐2,4‐dienones with the non‐haem iron(II)‐dependent extradiol catechol dioxygenase MhpB from E. coli resulted in the formation of 2‐tropolones through a pinacol‐type rearrangement. This ring expansion could also be effected nonenzymatically by treatment
在六岁和七岁时:我们已在实验上证明了拟议的取代2-对羟基苯甲酮生物合成中的环扩展。用来自大肠杆菌的非血红素依赖铁(II)的额外二元二醇邻苯二酚儿茶酚双加氧酶MhpB处理4个环己-2,4-二壬烯导致通过频哪醇型重排形成2-对苯二酮。通过1,4,7-三氮杂环壬烷和FeCl 2处理也可以非酶促地实现这种环的扩展。