Model reactions targeted at the synthesis of carbon-14 labeled CI-996, a potent antagonist of angiotensin II receptor (1)
作者:I. Victor Ekhato、Che C. Huang
DOI:10.1002/jlcr.2580340303
日期:1994.3
reaction sequence suitable for the preparation of an analog of 2-propyl-1-[2′-(1H-tetrazol-5-yl)[1,1′-biphenyl]-4-yl]methyl-4-[2-(trifluoroacetyl)-1H-pyrrol-1-yl]-1H-imidazole-5-carboxylic acid, with 14C at the methylene bridge was developed. The would-be labeled fragment (12) was derived from 4-iodobenzenemethanol (6), which itself was constructed from 1,4-dibromobenzene by the application of silicon
适用于制备2-丙基-1-[2'-(1H-四唑-5-基)[1,1'-联苯]-4-基]甲基-4-[2-]类似物的反应序列(三氟乙酰基)-1H-吡咯-1-基]-1H-咪唑-5-羧酸,在亚甲基桥上具有14C。可能被标记的片段 (12) 来自 4-碘苯甲醇 (6),其本身是通过应用硅化学从 1,4-二溴苯构建的。Pd°催化的TBDMS保护的6和硼酸四唑10的偶联得到化合物12,其在进一步转化为甲磺酸盐13后,N-烷基化咪唑以提供目标化合物。