Expeditious syntheses of stable and radioactive isotope-labeled anticonvulsant agent, JNJ-26990990, and its metabolites
作者:Ronghui Lin、Larry E. Weaner、David C. Hoerr、Rhys Salter、Yong Gong
DOI:10.1002/jlcr.3013
日期:2013.1
Syntheses of stable and radioactive isotope-labeled anticonvulsant agent, JNJ-26990990, that is, N-(benzo[b]thien-3-ylmethyl)-sulfamide and its metabolites are described. [13C15N]Benzo[b]thiophene-3-carbonitrile was first prepared by coupling of 3-bromo-benzo[b]thiophene with [13C15N]-copper cyanide. The resultant [13C15N]benzo[b]thiophene-3-carbonitrile was reduced with lithium aluminum deuteride to give [13CD215N]benzo[b]thiophen-3-yl-methylamine; which was then coupled with sulfamide to afford [13CD215N]-N-(benzo[b]thien-3-ylmethyl)-sulfamide, the stable isotope-labeled compound with four stable isotope atoms. Direct oxidation of [13CD215N]-N-(benzo[b]thien-3-ylmethyl)-sulfamide with hydrogen peroxide and peracetic acid gave the stable isotope-labeled sulfoxide and sulfone metabolites. On the other hand, radioactive 14C-labeled N-(benzo[b]thien-3-ylmethyl)-sulfamide was prepared conveniently by sequential coupling of 3-bromo-benzo[b]thiophene with [14C]-copper cyanide, reduction of the carbonitrile to carboxaldehyde, and reductive amination with sulfamide.
介绍了稳定的放射性同位素标记抗惊厥剂 JNJ-26990990,即 N-(苯并[b]噻吩-3-基甲基)-硫酰胺及其代谢物的合成。[13C15N]苯并[b]噻吩-3-甲腈首先是通过 3-溴-苯并[b]噻吩与[13C15N]-氰化亚铜偶联制备的。得到的[13C15N]苯并[b]噻吩-3-甲腈被氘化铝锂还原,得到[13CD215N]苯并[b]噻吩-3-甲基胺;然后与磺胺偶联,得到[13CD215N]-N-(苯并[b]噻吩-3-甲基)-磺胺,这是一种具有四个稳定同位素原子的稳定同位素标记化合物。用过氧化氢和过乙酸直接氧化[13CD215N]-N-(苯并[b]噻吩-3-基甲基)-硫酰胺,可得到稳定同位素标记的亚砜和砜代谢物。另一方面,通过 3-溴-苯并[b]噻吩与[14C]-氰化亚铜的连续偶联、将腈还原为羧醛并与磺酰胺进行还原胺化,可以方便地制备出放射性 14C 标记的 N-(苯并[b]噻吩-3-基甲基)-磺酰胺。