91047-69-7Relevant academic research and scientific papers
An unusual oxidation-dealkylation of 3,4-dihydropyrimidin-2(1H)-ones mediated by Co(NO3)2·6H2O/K2S2O8 in aqueous acetonitrile
Shanmugam, Pachaiyappan,Perumal, Paramasivan T.
, p. 666 - 672 (2007/10/03)
4-Aryl-6-methyl-3,4-dihydropyrimidin-2(1H)-one (DHPM) scaffolds of Biginelli type were oxidized using Co(II)/S2O82- and the?reaction afforded 6-unsubstituted pyrimidin-2(1H)-ones through an unprecedented dealkylation process. 4-Alkyl DHPMs under similar conditions afforded yet another unusual product, ethyl tetrahydropyrimidin-2,4(1H,3H)-dione-5-carboxylate.
Synthesis of functionalised pyrimidin-2-one derivatives
El-Nabi, Hisham A. Abd,El-Din, A.M. Nour,Fahmi, Magda S.
, p. 514 - 515 (2007/10/03)
Pyrimidin-2-one and pyrimidine-2-thione derivatives 5 and 7 are obtained in 40-65% and 60-75% yields when 4-ethoxycarbonyl-5-phenylfuran-2,3-dione (1) react with semicarbazones, thiosemicarbazones 2a-f, urea and thiourea derivatives 6a-d through loss of water and carbon dioxide.
REACTIONS OF 1-METHYL-DERIVATIVES OF 2-OXO-1,2,3,4-TETRAHYDROPYRIMIDINE WITH PHOSPHORUS PENTACHLORIDE AND PHOSPHORUS OXYCHLORIDE
Khanina, E. L.,Liepin'sh, E. E.,Mutsenietse, D. Kh.,Dubur, G. Ya.
, p. 554 - 557 (2007/10/02)
In the reaction of 4-phenyl- and 4,6-diphenyl-1-methyl-2-oxo-5-ethoxycarbonyl-1,2,3,4-tetrahydropyrimidines with phosphorus pentachloride, oxidation and dealkylation takes place in addition to chlorination and as result one obtained 4-phenyl- and 4,6-diph
1,2,3,4-TETRAHYDROPYRIMIDINES AND SOME OTHER COMPOUNDS BASED ON PROPIOLIC ACID DERIVATIVES
Khanina, E. L.,Mutsenietse, D. Kh.,Dubur, G. Ya.
, p. 431 - 433 (2007/10/02)
The reactions of ethyl propiolate and propiolamide with methylene and benzaldehyde and anisaldehyde in an acidic medium, in which the corresponding 2-oxo-1,2,3,4-tetrahydropyrimidines and 1,4-dihydropyrimidines or a 3,4-dihydropyrimidine derivative are formed, were studied.
