4-(N,N-Dialkylthiocarbamoylthio)-5-nitropyrimidines as new potential nitric oxide donors
作者:O. B. Ryabova、E. Yu. Khmel’nitskaya、V. A. Makarov、L. M. Alekseeva、N. B. Grigor’ev、V. G. Granik
DOI:10.1007/s11172-006-0203-5
日期:2005.12
On heating at pH 6.86, 4-(N,N-dialkylthiocarbamoylthio)-5-nitropyrimidines are transformed into dithiolopyrimidines, which are either oxidized to bis(4-dialkylthiocarbamoylpyrimidin-5-yl) disulfides or converted into 4,6-diamino-5-nitropyrimidine derivatives with carbon disulfide elimination. The direction of the reaction is determined by the nature of a substituent in position 2 of pyrimidine and the bulk of the thiocarbamate substituent. Mechanistic schemes for these processes were proposed.
加热至pH 6.86时,4-(N,N-二烷基硫代氨基甲酰基硫)-5-硝基嘧啶转化为二硫嘧啶,这些二硫嘧啶要么被氧化为双(4-二烷基硫代氨基甲酰基嘧啶-5-基)二硫化物,要么转化为4,6-二氨基-5-硝基嘧啶衍生物,并伴随有二硫化碳的消除。反应的方向由嘧啶2位取代基的性质和硫代氨基甲酸酯取代基的体积决定。为这些过程提出了机理方案。