Transformation of 6-methylthiopyrimidines. Preparation of new pyrimidine derivatives and fused azolopyrimidines
作者:Maria Teresa Cocco、Cenzo Congiu、Valentina Onnis
DOI:10.1002/jhet.5570370406
日期:2000.7
6-benzylaminopyrimidine derivatives 2 and 4 respectively. The reaction of 1 with hydrazine hydrate, in ethanol, gave 6-hydrazino derivatives 6. However, by treating pyrimidines 1 in boiling hydrazine hydrate 3,6-diamino-4-hydrazino-1H-pyrazolo[3,4-d]pyrimidine 5 was obtained. The 6-hydrazinopyrimidines 6 could be converted into the pyrazolo[3,4-d], triazolo[4,3-c] and tetrazolo-[1,5-c]pyrimidines 7, 8 and 9 by
2,4-二氨基-6-甲基硫代嘧啶1与甲氧基钠和苄胺反应,分别得到相应的6-甲氧基嘧啶和6-苄基氨基嘧啶衍生物2和4。1与水合肼在乙醇中的反应生成6-肼基衍生物6。但是,通过在沸腾水合肼3,6-二氨基-4-肼基-1 H-吡唑并[3,4- d ]嘧啶中处理嘧啶1获得5。可以将6-肼基嘧啶6转化为吡唑并[3,4- d ],三唑并[4,3- c ]和四唑并-[1,5- c嘧啶7、8和9分别通过加热,原甲酸三甲酯和亚硝酸作用。