A new method for the synthesis of the hydrazine derivatives (3) by reaction of azines with nitriles is described; the hydrolysis of (3) yields the 3H-pyrazolo[1,5-a]pyrimidines (4).
描述了一种通过嗪与腈反应合成肼衍生物(3)的新方法。(3)的水解产生3 H-吡唑并[1,5- a ]嘧啶(4)。
Synthesis and rearrangement of 5-isothiocyanatopyrazolines