作者:Su-Dong Cho、Yong-Dae Park、Jeum-Jong Kim、Sang-Gyeong Lee、Chen Ma、Sang-Yong Song、Woo-Hong Joo、J. R. Falck、Motoo Shiro、Dong-Soo Shin、Yong-Jin Yoon
DOI:10.1021/jo034593i
日期:2003.10.1
Pyrido[2,3-b][1,4]oxazin-2-ones are conveniently prepared in excellent yields by a one-pot annulation of N-substituted-2-chloroacetamides with 2-halo-3-hydroxypyridines with use of cesium carbonate in refluxing acetonitrile. The key transformation features a Smiles rearrangement of the initial O-alkylation product and subsequent cyclization.
吡啶[2,3-b] [1,4]恶嗪-2-酮可通过铯方便地通过N-取代-2-氯乙酰胺与2-卤代-3-羟基吡啶的一锅法制得,产率极高。回流的乙腈中加入碳酸根。关键转化的特征是初始O-烷基化产物的Smiles重排和随后的环化。