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.
嘧啶酮稠合砜5 - 7从脒与3-甲氧羰基-4- oxotetrahydrothiophene反应制得,随后加入N-甲基化和氧化用mCPBA。对在150℃下将溶液加热,SO的挤出2发生,得到高反应性的,其被拦截5,6- dimethylenepyrimidin -4-酮在原位在狄尔斯-阿尔德反应,得到加合物24 - 28和在共轭加成反应与巯基亲核素一起生成硫醚29和30。