N,N-dimethylformamidines (1a and 1b), tremendously influenced by the electronic nature of the substituents on C-5 of the thiazolic ring with various monosubstituted and conjugated ketenes is reported herein. The DA cycloadditions of the dienyl pyrimidinone 3h with both symmetrical as well as unsymmetrical dienophiles leading to the formation of various thiazolic pyrimidinone derivatives are also reported
N '-[(5-苯甲酰基和乙氧基羰基)
噻唑-2-基] -N,N-二甲基甲am(1a和1b)的反应性的比较说明,在很大程度上受取代基在C-5上C-5的电子性质的影响本文报道了具有各种单取代的和共轭的烯酮的
噻唑环。还报道了二烯基
嘧啶酮3h与对称和非对称亲二烯体的
DA环加成导致形成各种
噻唑基
嘧啶酮衍
生物。