Mild and efficient oxidative aromatization of 4-substituted-1,4-dihydropyrimidines using (diacetoxyiodo)benzene
作者:Nandkishor N. Karade、Sumit V. Gampawar、Nilesh P. Tale、Sanjay B. Kedar
DOI:10.1002/jhet.389
日期:——
4‐Alkyl or aryl‐1,4‐dihydropyrimidines were readily oxidized by (diacetoxyiodo)benzene under mild reaction conditions to the corresponding pyrimidine derivatives in good to excellent yields. J. Heterocyclic Chem., (2010).
A Cs2CO3-mediated simple and selective method for the alkylation and acylation of 3,4-dihydropyrimidin-2(1H)-thiones
作者:Salil Putatunda、Arijit Chakraborty
DOI:10.1016/j.crci.2013.12.006
日期:2014.10
excellent yields in the presence of Cs2CO3, a mild base. The method evidences a selective S-alkylation when using acyl chlorides as efficient acylating agents at room temperature on the 2-thioxo-dihydropyrimidone moiety. A possible mechanistic interpretation of the different selectivities in case of alkylation and acylation was done with the help of a geometry optimization process.
1,4-Dihydropyrimidines of the formula ##STR1## wherein X is sulfur or oxygen and R.sub.4 is aryl or heterocyclo and disclosed. These compounds are useful as cardiovacular agents, particularly anti-hypertensive agents, due to their vasodilator activity.