Silver-catalysed intramolecular cyclisation of 2-alkynylacetophenones and 3-acetyl-2-alkynylpyridines in the presence of ammonia
作者:Monica Dell'Acqua、Giorgio Abbiati、Antonio Arcadi、Elisabetta Rossi
DOI:10.1039/c1ob06271a
日期:——
Silver-catalysed/microwave-assisted domino reactions of 2-alkynyl-acetophenones and 3-acetyl-2-alkynylpyridines in the presence of ammonia are widely described. In most cases the reaction give a mixture of the imino- and carbo-cyclisation products, with a general preference for the former. A plausible mechanism is proposed and the dual activity of silver salts is supported by NMR experiments.
银催化/微波辅助的多米诺反应中,2-炔基-醋酰苯和3-醋酰-2-炔基吡啶在氨气存在下广泛被描述。在大多数情况下,反应会生成亚氨基化和碳环化产物的混合物,通常偏好前者。提出了一种合理的机制,并通过核磁共振实验支持银盐的双重活性。