thiosemicarbazones 4. The latter compounds were used to obtain the pyra zole derivatives 3, 5-7. A series of azines 8a-e were obtained by reacting 2 with aromatic aldehydes. Potassium permanganate oxidation of 1 gave the acid 9, which was transformed into the corresponding acid azide 11 then used to prepare diverse urea derivatives 13-18 via Curtius reaction .
氯-
3-甲基-1-苯基-1H-吡唑-4-甲醛(1)与
水合
肼和
氨基
硫脲反应,得到相应的腙2和
氨基
硫脲4。后一种化合物用于获得
吡唑衍
生物3 , 5-7. 通过将 2 与芳香醛反应得到一系列吖嗪 8a-e。1 的
高锰酸钾氧化得到酸 9,将其转化为相应的酸
叠氮化物 11,然后用于通过 Curtius 反应制备多种
尿素衍
生物 13-18。