Synthetic studies directed towards asmarines; construction of the tetrahydrodiazepinopurine moiety by ring closing metathesis
作者:Anders Vik、Lise-Lotte Gundersen
DOI:10.1016/j.tetlet.2007.01.090
日期:2007.3
They possess profound cytotoxic activity towards cancer cell lines, and are thus attractive synthetic targets. The tetrahydrodiazepinopurine ring skeleton has been prepared employing the RCM reaction on Boc-protected 6-allylamino-7-(propen-1-yl)purine as the key step for the construction of the seven-membered ring. 7-(Propen-1-yl)purines were formed by a novel rearrangement of 7-allylpurines under basic
Asmarines是从海洋海绵(Raspailia sp)中分离出的四氢[1,4]二氮杂[1,2,3- g,h ]嘌呤衍生物。它们对癌细胞系具有深远的细胞毒活性,因此是有吸引力的合成靶标。四氢二氮杂嘌呤嘌呤环骨架是采用Boc保护的6-烯丙基氨基-7-(丙烯-1-基)嘌呤上的RCM反应作为构建七元环的关键步骤而制备的。在碱性条件下,通过7-烯丙基尿素的新型重排形成7-(Propen-1-yl)嘌呤。Boc-保护的Ñ 6,7- diallylpurine也参加了RCM,得到diazepinopurine的八元环类似物。