Synthesis of nitro and amino<i>N</i>-heterocycles<i>via</i>ring transformation of 2-methyl-3-nitrochromone
作者:Kaname Takagi、Masaaki Tanaka、Yukitoshi Murakami、Kuniyoshi Ogura、Katsuyuki Ishii、Hikari Morita、Tomoji Aotsuka
DOI:10.1002/jhet.5570240420
日期:1987.7
2-Methyl-3-nitrochromone (1) reacted with acid hydrazides, S-methylisothiourea, hydroxylamine and ethyl aminoethanoate to give the nitro derivatives of pyrazole 2, pyrimidine 6, isoxazole 11 and pyrrole 13, respectively. These nitro compounds were reduced by catalytic hydrogenation to the corresponding amino derivatives. In the case of 2, a rearrangement of the acyl group took place during the reduction
2-甲基-3-硝基色酮(1)与酰肼,S-甲基异硫脲,羟胺和氨基乙酸乙酯反应,分别得到吡唑2,嘧啶6,异恶唑11和吡咯13的硝基衍生物。通过催化氢化将这些硝基化合物还原为相应的氨基衍生物。在2的情况下,在还原过程中发生了酰基的重排。还描述了6-中的2-甲硫基的取代反应。