Synthesis of 2,6-dimethylbenzamide N-(5-methyl-3-isoxazolyl) (D2916) labelled with 14C
作者:Elmostafa Azim、Jean Claude Maurizis、Jean Michel Dupuy、Françis Lepage、Annie Veyre、Jean Claude Madelmont
DOI:10.1002/(sici)1099-1344(199711)39:11<955::aid-jlcr35>3.0.co;2-c
日期:1997.11
Carbonation of 2,6-dimethyl phenyl lithium with 14CO2 afforded 2,6-dimethylbenzoic acid, α-14C 2 which was transformed into 2,6-dimethylbenzoic acid halide,α-14C 3. Subsequent condensation of the latter compound with 3-amino 5-methyl isoxazole afforded 2,6-dimethylbenzamide N-(5-methyl-3-isoxazolyl) (D2916) 4 (radiochemical 95% purity) in an overall yield of about 35% based on [14C] barium carbonate.
2,6-二甲基苯基锂与 14CO2 碳酸化得到 2,6-二甲基苯甲酸,α-14C 2 其转化为 2,6-二甲基苯甲酰卤,α-14C 3。后者化合物与 3-氨基的后续缩合5-甲基异恶唑以基于[14C]碳酸钡的约35%的总产率提供2,6-二甲基苯甲酰胺N-(5-甲基-3-异恶唑基)(D2916) 4 (放射化学纯度95%)。© 1998 John Wiley & Sons, Ltd.