One-Pot Tandem Assembly of Amides, Amines, and Ketones: Synthesis of C4-Quaternary 3,4- and 1,4-Dihydroquinazolines
作者:Molly V. Campbell、Alexei V. Iretskii、R. Adam Mosey
DOI:10.1021/acs.joc.0c01308
日期:2020.9.4
the synthesis of diverse C4-quaternary 3,4-dihydroquinazolines from amides, amines, and ketones has been developed. The one-pot reaction involves successive triflic anhydride mediated amide dehydration, ketimine addition, and Pictet–Spengler-like cyclization processes and affords products in up to 92% yield. Conversion of 3,4-dihydroquinazolines to the corresponding 1,4-dihydroquinazolines via a two-step
已开发了一种从酰胺,胺和酮合成多种C4-季3,4-二氢喹唑啉的多组分串联组装程序。一锅式反应涉及连续的三氟甲磺酸酐介导的酰胺脱水,酮亚胺添加和Pictet-Spengler样环化过程,可提供高达92%的收率的产品。还描述了通过两步N1脱烷基和区域选择性N3官能化方案将3,4-二氢喹唑啉转化为相应的1,4-二氢喹唑啉,包括所观察到的区域选择性的计算原理。