Highly Regioselective Carbamoylation of Electron-Deficient Nitrogen Heteroarenes with Hydrazinecarboxamides
作者:Zeng-Yang He、Chao-Fan Huang、Shi-Kai Tian
DOI:10.1021/acs.orglett.7b02312
日期:2017.9.15
The use of hydrazinecarboxamides as a new class of carbamoylating agents has been established through the dehydrazinative Minisci reaction of electron-deficient nitrogen heteroarenes. A wide range of electron-deficient nitrogen heteroarenes, including isoquinoline, quinoline, pyridine, phenanthridine, quinoxaline, and phthalazine, underwent copper/acid-catalyzed oxidative carbamoylation with hydrazinecarboxamide
通过缺电子氮杂芳烃的脱水肼Minisci反应,已确立了将肼甲酰胺用作新型氨基甲酰化剂的用途。各种电子不足的氮杂芳烃,包括异喹啉,喹啉,吡啶,菲啶,喹喔啉和邻苯二甲酰肼,用肼基甲酰胺盐酸盐进行铜/酸催化的氧化氨基甲酰化反应,制得结构多样的氮-杂芳基甲酰胺,可作为中等至最佳的单一区域异构体产量。奎宁的直接氨基甲酰化消除了涉及保护基团和杂环的预官能化的多步序列,从而充分证明了该功能基团的耐受性。