Catalytic Syntheses of N-Heterocyclic Ynones and Ynediones by In Situ Activation of Carboxylic Acids with Oxalyl Chloride
作者:Christina Boersch、Eugen Merkul、Thomas J. J. Müller
DOI:10.1002/anie.201103296
日期:2011.10.24
bottleneck: α‐Keto carboxylic acids and N‐heterocyclic carboxylic acids are activated in situ with oxalyl chloride then catalytically alkynylated to give ynediones and N‐heterocyclic ynones efficiently in a one‐pot fashion. 5‐Acylpyrazoles and 2‐phenylaminopyrimidines, potentially interesting for pharmaceutical applications, are readily synthesized in concise one‐pot, three‐component syntheses.
突破瓶颈:使用草酰氯将α-酮基羧酸和N-杂环羧酸原位活化,然后进行催化炔基化反应,以单锅方式有效地产生乙炔和N-杂环炔酮。5-酰基吡唑和2-苯基氨基嘧啶可能在药物应用中很有趣,它们可以通过简单的一锅,三成分合成方法轻松合成。