Generation and trapping of 5,6-dimethylenepyrimidin-4-ones in Diels-Alder and Michael additions
作者:Augusto C. Tomé、Cavaleiro José A.S、Richard C. Storr
DOI:10.1016/0040-4020(95)01008-4
日期:1996.1
followed by N-methylation and oxidation with mCPBA. On heating in solution at 150°C, extrusion of SO2 occured to give the highly reactive 5,6-dimethylenepyrimidin-4-ones which were intercepted in situ in Diels-Alder reactions to give the adducts 24–28 and in conjugate addition reactions with thiol nucleophiles to give the thioethers 29 and 30.