Synthesis of [2-14C] fantofarone or 1-[4-[3-N-methyl N-[3,4-dimethyl β-phenethyl] amino propyloxy] benzene sulfonyl]-2-isopropyl [2-14C] indolizine
作者:P. Pointeau、Y. Berger
DOI:10.1002/jlcr.2580341104
日期:1994.11
Sodium [1-14C] isobutyrate: 1 was obtained by carbonation of isopropyl magnesium bromide with 14CO2. From: 1 [1-14C] isobutyryl chloride: 3 was prepared, which through the successive actions of diazomethane and hydrogen bromide gave rise to 1-bromo 3 methyl [2-14C] 2-butanone: 5. The latter lead to the indolizine: 6 which by a route patterned after that used to make unlabelled Fantofarone gave the [2-14C-indolizyl] Fantofarone: 8 (specific radioactivity: 58.2 mCi/mMole) overall yield 9.9% based on [14C] BaCO3.
[1-14C]异丁酸钠:1 是由异丙基溴化镁与 14CO2 碳化反应得到的。从1 [1-14C] 异丁酰氯:通过重氮甲烷和溴化氢的连续作用,制备出 1-bromo 3 methyl [2-14C] 2-butanone: 5。 后者又生成了吲哚利嗪:6,通过仿照制备未标记方托法隆的路线,得到[2-14C-吲哚苄基]方托法隆:8(比放射性:58.2 mCi/mMole),以[14C] BaCO3 为基准,总收率为 9.9%。