Pteridines. Part XLI. Synthesis and properties of 6,7,8-trimethyl-4-thiolumazine
作者:Walter Hübsch、Wolfgang Pfleiderer
DOI:10.1002/hlca.19890720414
日期:1989.6.14
into the 5-position ( 9; Scheme 1). Reduction of the p-chlorophenylazo group leads to the 6-(methlyamino)-4-thiouracil-5-amine (10) which on condensation with diacetyl gives 6,7,8-trimethyl-4-thiolumazine (8). The physical properties of 8 are compared with the 2-thio analog and 6,7,8-trimethyllumazine indicating that 8 possesses the highest acidity and the longest UV absorption.
已经合成了8-取代的4-硫代鲁嗪系列的第一个代表。在一系列反应中,首先将4,6-二氯嘧啶-2-(1 H)-一(1)转化为4-氯-6-(甲基氨基)嘧啶-2(1 H)-一(6),然后Cl原子被thioxo基团(7)取代,然后与4-氯苯基重氮氯化物发生偶联反应,将必要的N-官能团引入5位(9;方案1)。对-氯苯基偶氮基的还原产生6-(甲基氨基)-4-硫尿嘧啶-5-胺(10),其与二乙酰基缩合后得到6,7,8-三甲基-4-硫代azine嗪(8)。将8的物理性质与2-硫代类似物和6,7,8-三甲基鲁嗪进行比较,表明8具有最高的酸度和最长的UV吸收。