作者:Kai Cao、Samuel J. Bonacorsi、Balu Balasubramanian、Ronald L. Hanson、Percy Manchand、Jollie D. Godfrey、Rita Fox、Lisa J. Christopher、Hong Su、Ramaswamy Iyer
DOI:10.1002/jlcr.1450
日期:2007.11
An efficient synthesis of carbon-14-labeled Saxagliptin (BMS-477118) is described. Initial synthesis of the key radiolabeled intermediate (S)-N-Boc-2-(3′-hydroxyadamantyl)glycine 2a utilized adamantanemethanol in a 10-step sequence. To shorten the sequence, 1-adamantylzinc bromide was reacted with ethyl [1, 2-14C]oxalyl chloride catalyzed by [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (II). In five steps, 2b was synthesized in an overall yield of 20% based on ethyl [1, 2-14C]oxalyl chloride. Compound 2b was subsequently converted to [14C] BMS-477118 in a short sequence. Copyright © 2007 John Wiley & Sons, Ltd.
本文介绍了碳 14 标记的沙格列汀 (BMS-477118) 的高效合成方法。关键放射性标记中间体(S)-N-Boc-2-(3′-羟基金刚烷基)甘氨酸 2a 的初始合成采用了金刚烷甲醇 10 步顺序。为了缩短步骤,1-金刚烷基溴化锌在[1,1′-双(二苯基膦)二茂铁]二氯化钯(II)的催化下与乙基[1, 2-14C]草酰氯反应。以[1, 2-14C]草酰氯乙酯为基础,分五个步骤合成了 2b,总收率为 20%。随后,化合物 2b 在短时间内被转化为 [14C] BMS-477118。Copyright © 2007 John Wiley & Sons, Ltd. All Rights Reserved.