Studies on fluorinated pyrimidines. I. A new method of synthesizing 5-fluorouracil and its derivatives.
作者:OSAMU MIYASHITA、KOICHI MATSUMURA、HIROSHI SHIMADZU、NAOTO HASHIMOTO
DOI:10.1248/cpb.29.3181
日期:——
A series of 5-fluoro-6-substituted-5, 6-dihydrouracil-5-carboxylic esters (13), -5-carboxamides (15, 16), and -5-carbonitriles (18, 19) was prepared by direct fluorination of the corresponding uracil-5-carboxylic esters (6), -5-carboxamide (14), and -5-carbonitrile (17) with fluorine or trifluoromethyl hypofluorite (CF3OF) in the presence of water, methanol and/or acetic acid. Hydrolysis of the above-mentioned products under mild conditions gave 5-fluorouracil (1a) in high yield. Some applications of the present method for the synthesis of 1-(2-tetrahydrofuryl)-5-fluorouracil (1b) were also described.
一系列5-氟-6-取代-5,6-二氢尿嘧啶-5-羧酸酯(13)、-5-羧酰胺(15, 16)和-5-氰(18, 19)通过将相应的尿嘧啶-5-羧酸酯(6)、-5-羧酰胺(14)和-5-氰(17)直接氟化,使用氟或三氟甲基亚氟酸酯(CF3OF),在水、甲醇和/或醋酸的存在下制备而成。在温和条件下水解上述产物,得到了高产率的5-氟尿嘧啶(1a)。还描述了该方法在合成1-(2-四氢呋喃基)-5-氟尿嘧啶(1b)中的一些应用。