Synthesis of the tritiated isotopomers of enzastaurin and itsN-des-pyridylmethyl metabolite for use in ADME studies
作者:William J. Wheeler、Dean K. Clodfelter
DOI:10.1002/jlcr.1497
日期:2008.3.30
Enzastaurin (3-(1-methyl-1H-indol-3-yl)-4-[1-[1-(2-pyridinylmethyl)-4-piperidinyl]-1H-indol-3-yl]-1H-pyrrole-2,5-dione, 1), an agent with potential utility in the treatment of solid tumors, is currently in phase II clinical trials. Enzastaurin undergoes metabolism in vitro and in vivo to several products of oxidative metabolism, the major one of which is 3-(1-methyl-1H-indol-3-yl)-4-(1-piperidin-4-yl-1H-indol-3-yl)-1H-pyrrole-2,5-dione (2). In a model study, the attempted synthesis 1-[2H] by reaction of 1 with deuterium gas in the presence of Ir[(COD)(Cy3P)pyr]PF6 (Crabtree's catalyst) was unsuccessful. Alternatively, it was decided to prepare tritiated 2 as both a final product and the starting material for the tritiation of 1. We have reported herein a route that was developed for use in the preparation of tritium-labeled 2-[3H] and its successful conversion to 1-[3H]. Copyright © 2008 John Wiley & Sons, Ltd.
Enzastaurin(3-(1-甲基-1H-吲哚-3-基)-4-[1-[1-(2-吡啶基甲基)-4-哌啶基]-1H-吲哚-3-基]-1H-吡咯-2,5-二酮,1)是一种在治疗实体瘤方面具有潜在用途的药物,目前正在进行 II 期临床试验。Enzastaurin 在体外和体内经过代谢会生成多种氧化代谢产物,其中最主要的是 3-(1-甲基-1H-吲哚-3-基)-4-(1-哌啶-4-基-1H-吲哚-3-基)-1H-吡咯-2,5-二酮 (2)。在一项示范研究中,尝试在 Ir[(COD)(Cy3P)pyr]PF6 (Crabtree 催化剂)存在下通过 1 与氘气反应合成 1-[2H],但没有成功。我们在此报告了一条用于制备氚标记的 2-[3H]并成功将其转化为 1-[3H]的路线。Copyright © 2008 John Wiley & Sons, Ltd. 版权所有。