Abstract

Diazotization of aminopyridines in the presence of trifluoromethanesulfonic acid gives the corresponding pyridinyl trifluoromethanesulfonates instead of expected diazonium salts. Pyridinyl trifluoromethanesulfonates can be converted to N,N-dimethylaminopyridines on heating in dimethylformamide via replacement of the trifluoromethanesulfonyloxy group. The reaction is accelerated under microwave irradiation. A novel one-pot procedure has been proposed for the synthesis of 2- and 4-(dimethylamino)pyridines from commercially available aminopyridines. The procedure provides high yields of the target products, and it can be regarded as an alternative to the known methods of synthesis of N,N-dimethylpyridin-4-amine (DMAP) widely used as base catalyst in organic synthesis.

中文翻译：

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在三氟甲磺酸存在下，通过氨基吡啶在二甲基甲酰胺中的重氮化反应，一锅法合成N，N-二甲基氨基吡啶

摘要

在三氟甲磺酸的存在下氨基吡啶的重氮化可得到相应的吡啶基三氟甲磺酸盐，而不是预期的重氮盐。在二甲基甲酰胺中加热时，通过取代三氟甲磺酰氧基，可以将吡啶三氟甲磺酸吡啶酯转化为N，N-二甲基氨基吡啶。在微波辐射下反应被加速。已经提出了一种新颖的一锅法，用于从可商购的氨基吡啶合成2-和4-（二甲基氨基）吡啶。该方法提供了目标产物的高收率，并且可以被认为是已知的N，N合成方法的替代方法。-二甲基吡啶-4-胺（DMAP）广泛用作有机合成中的基础催化剂。