Synthesis of Hexahydrobenzo[<i>b</i>]pyrimido[4,5-<i>h</i>][1,6]naphthyridines via an Intramolecular Hetero-Diels−Alder Reaction
作者:Fengzhi Yang、Lianyou Zheng、Jinbao Xiang、Qun Dang、Xu Bai
DOI:10.1021/cc100018b
日期:2010.7.12
Method development was completed for a strategy to access a novel pyrimidine-fused heterocyclic scaffold. The key step for this synthetic route entails an intramolecular inverse electron demand hetero-Diels-Alder reaction of imines or iminiums formed in situ from allylaminopyrimidinealdehydes 3 and anilines. The reactions provided exclusively cis-configuration products 6. Products 6 were readily precipitated