尝试通过次溴酸钾对噻唑-4,5-二甲酰胺的作用制备噻唑并[4,5- d ]嘧啶-5,7-二醇的方法表明,当2-取代基被取代时,该稠环系统的噻唑部分不稳定。不足。与先前的报道相反,获得的产物是双-(4-氨基-2,6-二氢嘧啶-5-基)二硫化物。通过将相应的4-氨基嘧啶-5-基硫氰酸酯环化,已经制备了许多噻唑洛[4,5- d ]嘧啶。用亚硝酸对氨基噻唑并[4,5- d ]嘧啶进行脱氨基反应,得到了许多衍生物,其中之一是尿酸的类似物。
Iodine mediated an efficient and greener thiocyanation of aminopyrimidines by a modification of the Kaufmann’s reaction
摘要:
A new, safe, and efficient methodology for the thiocyanation of some aminopyrimidine derivatives has been implemented. The thiocyanation reactions proceeded at room temperature with high yields and selectivity. This route is a less toxic alternative to other common thiocyanation techniques because it uses molecular iodine as a halogen source, which is less reactive and easier to handle than chlorine or bromine. (C) 2011 Elsevier Ltd. All rights reserved.