Several 5-cinnamoyl- and 5-(ethoxycarbonyl)-6-styryl derivatives of 4-aryl-3,4-dihydropyrimidin-2(1H)-ones were obtained and their physicochemical properties were investigated. The introduction of alkyl substituent in position 1 of dihydropyrimidine ring was shown to promote the Claisen-Schmidt reaction on acetyl group only; without the alkyl both acetyl and 6-methyl groups participate in the reaction.
得到了几种4-芳基-3,4-二氢
嘧啶-2(1
H)-酮的5-肉桂酰基和5-(乙氧羰基)-6-
苯乙烯基衍
生物,并研究了它们的物理
化学性质。在二氢
嘧啶环的1位引入烷基取代基表明仅促进了乙酰基上的克莱森-施密特反应;没有烷基时,乙酰基和6-甲基基团都参与反应。