Iodine(III)-mediated aromatic amidation vs olefin amidohydroxylation. The amide N-substituent makes the difference
作者:Sonia Serna、Imanol Tellitu、Esther Domı́nguez、Isabel Moreno、Raúl SanMartin
DOI:10.1016/j.tet.2004.06.007
日期:2004.7
and an allyl group have been treated with phenyliodine(III)bis(trifluoroacetate) to generate stabilized N-acylnitrenium intermediates. It has been observed that, when starting from N-methoxy substituted amides, such intermediates are intramolecularly trapped by nucleophilic arene rings to render the quinolinone skeleton. Alternatively, under the same reaction conditions, N-para-methoxyphenylamides afford
一系列Ñ甲氧基和ñ -对在由一个苄基和烯丙基α位置-methoxyphenylacetamides同时取代已经phenyliodine处理(III)双(三氟乙酸盐),以产生稳定的Ñ -acylnitrenium中间体。已经观察到,当从N-甲氧基取代的酰胺开始时,这些中间体在分子内被亲核芳烃环捕获以形成喹啉酮骨架。可替换地,在相同的反应条件下,ñ -对-methoxyphenylamides通过烯烃amidohydroxylation过程得到吡咯烷酮衍生物。