3019-18-9Relevant academic research and scientific papers
Alkynylation of halo pyrimidines under Pd/C-copper catalysis: regioselective synthesis of 4- and 5-alkynylpyrimidines
Pal, Manojit,Batchu, Venkateswara Rao,Swamy, Nalivela Kumara,Padakanti, Srinivas
, p. 3923 - 3928 (2006)
5-Bromo-4-chloro-6-methylpyrimidines underwent facile Pd/C-Cu catalyzed coupling reactions with a variety of terminal alkynes, which resulted in the corresponding 4-alkynyl-5-bromopyrimidines, regioselectively, with good yields. 4-Chloro-5-iodo-6-methylpy
A green and facile synthesis of 6-Methyl-2-(alkylthio)pyrimidin-4(3H)-one
Kotaiah,Ramadevi,Naidu,Dubey
, p. 9869 - 9871 (2014/01/06)
Reaction of 2-thiouracil (1) with alkylating agents, namely dimethyl sulphate, diethyl sulphate and benzyl chloride in the presence of potassium carbonate as a mild base, under green conditions, such as simple physical grinding of reactants or in solvents such as ethanol and PEG-600 and under microwave irradiation, gave, respectively 6-methyl-2-(methylthio)pyrimidin-4(3H) -one (2a, i.e., R=CH3), 6-methyl-2-(ethylthio) pyrimidin-4(3H)-one (2b, i.e., R = C2H5) and 6-methyl-2-(benzylthio)pyrimidin- 4(3H)-one (2c, i.e., R = PhCH2Cl). Alternately, condensation of ethyl acetoacetate with S-methylisothiouronium hemisulfate, S-ethylisothiouronium hemisulfate and S-benzyl isothiouronium chloride in ethanolic potassium hydroxide under reflux for 3 h gave 2a-c respectively.
Special features of the nucleophilic substitution of halogen in alkyl and benzyl halides with anions generated from 4-hydroxy-2-mercapto-6- methylpyrimidine
Rakhimov,Titova,Fedunov,Babkin, Vladimir Aleksandrovich
experimental part, p. 700 - 708 (2009/04/06)
The nucleophilic substitution of halogen (chlorine, bromine, and iodine) in alkyl and benzyl halides has been effected in aqueous dioxane media with S-and O-anions generated from 4-hydroxy-2-mercapto-6-methylpyrimidine. Under these conditions replacement
Synthesis of 2-alkyl(aralkyl)sulfanyl-6-methylpyrimidin-4(3H)-ones and 4-alkyl(aralkyl)oxy-2-alkyl(aralkyl)sulfanyl-6-methylpyrimidines
Rakhimov,Titova
, p. 96 - 102 (2007/10/03)
2-Alkyl(aralkyl)sulfanyl-6-methylpyrimidin-4(3H)-ones and 4-alkyl(aralkyl)oxy-2-alkyl(aralkyl)-sulfanyl-6-methylpyrimidines having similar or different substituents on the sulfur and oxygen atoms were synthesized by alkylation of sodium salts derived from
STUDY OF REACTION OF THIOUREA WITH ETHYL 3-OXOBUTANOATE
Kavalek, Jaromir,El-Bahaie, Said,Machacek, Vladimir,Sterba, Vojeslav
, p. 732 - 739 (2007/10/02)
Base-catalyzed formation of 6-methyl-2-thiouracil (III) by reaction of thiourea (I) with ethyl 3-oxobutanoate (II) involves N-(3-oxobutanoyl)thiourea (XI) as the reaction intermediate.In acid medium the compounds I and II do not react.In contrast to literature data, base-catalyzed cyclization of ethyl 3-thioureido-2-butenoate (IV) does not produce the compound III, but produces 2-amino-4-methyl-6-oxo-1,3-thiazine.
