The reaction of styryl ketonic Mannich bases 2a - c with phenylhydrazine leads to 3-functionalized 2-pyrazolines 4 or 6 depending on the reaction conditions. 3-[β -(Arylamino)ethyl]-2-pyrazolines 8a,b were obtained via transamination between the methiodide salt 7 and primary arylamines. Treatment of 1-(p-anisyl)-1,2,5-tri(N-piperidino)pentan-3-one (11) with phenylhydrazine affords the 3,4-difunctionalized
取决于反应条件,
苯乙烯基酮曼尼希碱 2a-c 与苯
肼的反应产生 3-官能化的 2-
吡唑啉 4 或 6。3-[β-(芳
氨基)乙基]-2-
吡唑啉8a,b通过甲
硫氨酸盐7和芳基
伯胺之间的
氨基转移获得。用苯
肼处理 1-(p-anisyl)-1,2,5-tri(N-piperidino)pentan-3-one (11) 得到 3,4-双官能化的 2-
吡唑啉 12。 酮碱的反应19或21与
肼导致4-官能化的2-
吡唑啉20和22,N-曼尼希碱23和24从22a获得。3-[β-(苯
硫基)乙基]-2-
吡唑啉28a,b的合成是通过用苯
肼处理26或27来实现的。