in the presence of a catalytic amount of aqueous HCl under microwave irradiation or without it afforded new 4-4-[(alkylsulfanyl)methyl]-3,5-dimethyl-1H-pyrazole-1-carbonyl)pyridines. 3-[(Alkanesulfonyl)methyl]pentane-2,4-diones under similar conditions were converted to the corresponding 4-[(alkanesulfonyl)methyl]-3,5-dimethyl-1H-pyrazoles.
摘要 3-[(烷基
硫基)甲基]
戊烷-2,4-二酮与
异烟酸酰
肼在
乙醇中在催化量的HCl
水溶液存在下在微波辐射下或没有它的情况下进行杂环化,得到新的4-4-[(烷基
硫基)甲基]-3,
5-二甲基-1H-
吡唑-1-羰基)
吡啶。3-[(烷磺酰基)甲基]
戊烷-2,4-二酮在类似条件下转化为相应的4-[(烷磺酰基)甲基]-3,
5-二甲基-1H-
吡唑。