作者:Giuliana Pitacco、Alessandro Pizzioli、Ennio Valentin
DOI:10.1055/s-1996-4190
日期:1996.2
The morpholino enamine of monoprotected butane-2,3-dione reacts with cyclic and acyclic conjugated nitroalkenes in a Michael-type reaction to yield nitro-substituted α-diketones, after acidic hydrolysis of the mononitroalkylated enamine adducts. Cyclopentanone, hexahydro-1H-pentalen-2-one and octahydro-2H-inden-2-one derivatives are readily obtained by base-catalyzed intramolecular nitroaldol reaction of the acyclic hydrolysis products.
单保护丁烷-2,3-二酮的吗啉代烯胺在迈克尔型反应中与环状和无环共轭硝基烯烃反应,在单硝基烷基化烯胺加合物的酸性水解后生成硝基取代的α-二酮。环戊酮、六氢-1H-戊烯-2-酮和八氢-2H-茚-2-酮衍生物很容易通过无环水解产物的碱催化分子内硝基羟醛反应获得。