Cyclization reactions of N-acryloyl-2-aminobenzaldehyde derivatives: formal total synthesis of martinellic acid
作者:Yong He、Hossen Mahmud、Remond Moningka、Carl J. Lovely、H.V. Rasika Dias
DOI:10.1016/j.tet.2006.06.104
日期:2006.9
N-Alkyl acryloylamides derived from o-aminobenzaldehyde derivatives react with N-alkyl glycine derivatives to provide cis-fused pyrrole[3,2-c]quinolones in moderate yield and high diastereoselectivity. These same substrates engage in a tandem Michael–Mannich pathway on treatment with a secondary amine, providing corresponding quinolone derivatives. The elaboration of a pyrroloquinolone derivative via
衍生自邻氨基苯甲醛衍生物的N-烷基丙烯酰胺与N-烷基甘氨酸衍生物反应,以中等收率和高非对映选择性提供顺式稠合的吡咯[3,2- c ]喹诺酮。这些相同的底物在用仲胺处理时也参与了串联的Michael–Mannich途径,提供了相应的喹诺酮衍生物。通过将原位生成的官能化乙炔铜加到原位生成的亚胺鎓离子上,对吡咯并喹诺酮衍生物进行精制,得到了C 2-取代的衍生物。全局脱保护和炔烃的还原提供了在马汀酸中发现的三环三胺核(作为HCl盐)。