Efficient Synthesis of 2-(2-Aminophenyl)-2,3-dihydropyridin-4(1H)-ones Based on a Cyclization/Ring Cleavage Procedure
作者:Vahuni Karapetyan、Satenik Mkrtchyan、Gnuni Karapetyan、Alexander Villinger、Ashot Saghiyan、Tariel V. Ghochikyan、Peter Langer
DOI:10.1002/hlca.201100130
日期:2011.11
(Benzyloxycarbonyl)‐protected 3,4‐benzo‐7‐hydroxy‐2,9‐diazabicyclo[3.3.1]non‐7‐enes were prepared by one‐pot cyclizations of 1,3‐bis(silyl enol ethers) with quinazolines. Subsequent hydrogenation resulted in one‐pot deprotection and rearrangement to give 2‐(2‐aminophenyl)‐2,3‐dihydropyridin‐4(1H)‐ones.
(苄氧羰基)保护的3,4-苯并-7-羟基-2,9-二氮杂双环[3.3.1] non-7-烯是通过1,3-双(甲硅烷基烯醇醚)与喹唑啉的一锅环化制备的。随后的氢化导致一锅脱保护和重排,得到2-(2-氨基苯基)-2,3-二氢吡啶-4-4 (1 H)-。