A New Synthetic Route to Polyalkoxypyrimidines Based on the Reaction of Esters and Methyl Thiocyanate
作者:Antonio Herrera、Roberto Martínez-Alvarez、Pedro Ramiro、John Almy、Dolores Molero、Angel Sánchez
DOI:10.1002/ejoc.200600222
日期:2006.8
The reaction of aliphatic esters with methyl thiocyanate and triflic anhydride affords substituted 4-alkoxy-2,6-bis(methylthio)pyrimidines with minor amounts of substituted S-methyl N-alkanoylthiocarbamates. The structure of the starting ester appears to determine the ratio of final products. Methylthio groups on the pyrimidine ring can be easily converted into methylsulfonyl groups by oxidation. Controlled
脂肪族酯与硫氰酸甲酯和三氟甲磺酸酐的反应得到取代的 4-烷氧基-2,6-双(甲硫基)嘧啶和少量取代的 S-甲基 N-烷酰基硫代氨基甲酸酯。起始酯的结构似乎决定了最终产品的比例。嘧啶环上的甲硫基很容易通过氧化转化为甲磺酰基。一个或两个甲基磺酰基的受控取代导致氨基二烷氧基和三烷氧基嘧啶的形成。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)