作者:Sivappa Rasapalli、Venkatreddy Kumbam、Abasaheb N. Dhawane、James A. Golen、Carl J. Lovely、Arnold L. Rheingold
DOI:10.1039/c3ob40668g
日期:——
The total syntheses of oroidin, hymenidin and clathrodin are reported via the intermediacy of an imidazo[1,2-a]pyrimidine derivative. The chemistry described herein obviates the need for expensive guanidine reagents, multiply protected prefunctionalized 2-aminoimidazole synthons, or the need for laborious olefinations thereby achieving synthetic efficiency amenable to scale-up. The approach outlined in this manuscript provides an opportunity for further functionalizations through the imidazo[1,2-a]pyrimidine core and through functional groups placed strategically on the side chain.
报告通过咪唑并[1,2-a]嘧啶衍生物作为中间体,全合成了橘皮苷、绣线菊苷和橘皮苷。本文所述的化学方法无需使用昂贵的胍类试剂、多重保护的预官能化 2-氨基咪唑合成物,也无需费力地进行烯化反应,从而提高了合成效率,适合规模化生产。本手稿中概述的方法为通过咪唑并[1,2-a]嘧啶核心以及通过战略性地置于侧链上的官能团进一步官能化提供了机会。