作者:Marc D. Ogan、David J. Kucera、Yadagiri R. Pendri、J. Kent Rinehart
DOI:10.1002/jlcr.955
日期:2005.8
Radiolabelled [14C]entecavir, (1), was prepared in 12 steps from (1S,2R,3S,5R)-3-(benzyloxy)-2-(benzyloxymethyl)-6-oxa-bicyclo[3.1.0]hexane 2. The chemical yield of [14C]entecavir was 14% from the epoxide 2. Introduction of [14C] radiolabel was achieved by elaboration of 4,5-diaminopyrimidine 8 with triethyl[14C]orthoformate to purine derivative 9. The radiochemical yield of [14C]entecavir from triethyl[14C]orthoformate was 11.3%. Radiochemical purity of [14C]entecavir determined by HPLC was 99.8%. The specific activity of [14C]entecavir was 108 µCi/mg (29.9 mCi/mmol). Copyright © 2005 John Wiley & Sons, Ltd.
放射性标记的[14C]恩替卡韦(1)是通过12步从(1S,2R,3S,5R)-3-(苄氧基)-2-(苄氧甲基)-6-氧-双环[3.1.0]己烷2合成的。[14C]恩替卡韦的化学收率为14%,来自环氧化物2。通过将4,5-二氨基嘧啶8与三乙基[14C]正腈酸酯反应,获得了嘌呤衍生物9,从而引入了[14C]放射标记。[14C]恩替卡韦从三乙基[14C]正腈酸酯的放射化学收率为11.3%。通过高效液相色谱法(HPLC)测定,[14C]恩替卡韦的放射化学纯度为99.8%。[14C]恩替卡韦的比活性为108 µCi/mg(29.9 mCi/mmol)。版权所有 © 2005 约翰·威利与儿子有限公司。