A methylenation–cyclization reaction, employing cyclic enaminones with primary aromatic amines and two molecules of CO2, furnishing fused-tetrahydropyrimidines, is discussed. In this Cs2CO3 and ZnI2 catalyzed one-pot two-step procedure, two molecules of CO2 were selectively converted to methylene groups. The multi-component reaction might proceed through the formation of bis(silyl)acetal which was
讨论了使用环状烯胺酮与伯芳香胺和两个 CO 2分子,提供稠合四氢
嘧啶的亚甲基化-环化反应。在这个Cs 2 CO 3和ZnI 2催化的一锅两步法中,两个CO 2分子被选择性地转化为亚甲基。多组分反应可能通过形成双(甲
硅烷基)
缩醛进行,然后是缩合和进一步的氮杂-狄尔斯-阿尔德反应。氢
喹唑啉、氢
环戊二烯[ d ]
嘧啶和氢
茚并[1,2- d ]
嘧啶衍
生物可以以CO 2作为C1源有效地制备。