Comparative reactivity of N′-(5-benzoyl/ethoxycarbonyl)thiazol-2-yl-N,N-dimethylformamidines with ketenes
作者:Parvesh Singh、Alka Marwaha、Harmeet Singh、Mohinder P. Mahajan
DOI:10.1016/j.tet.2005.09.008
日期:2005.12
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。