First Example of <i>s</i>-BuLi/(-)-Sparteine-Mediated Chiral Deprotonation of a Piperazine and Proof of the Sense of Induction
作者:Benjamin McDermott、Andrew Campbell、Anne Ertan
DOI:10.1055/s-2008-1042905
日期:2008.4
deprotonation of a piperazine. Reaction of TERT-butyl 4- TERT-butylpiperazine-1-carboxylate with S-BuLi in the presence of (-)-sparteine at -78 °C and quenching with carbon dioxide proceeded in good yield and with a high degree of selectivity (er = 89:11). X-ray crystal structureanalysis on a chiral derivative confirmed the R-enantiomer was the majorproduct. This methodology was employed as a route to an
本文描述了 (-)-sparteine 介导的哌嗪不对称去质子化的第一个已知例子。4-叔丁基哌嗪-1-羧酸叔丁酯与 S-BuLi 在 (-)-sparteine 存在下在 -78 °C 和用二氧化碳淬灭的反应以良好的产率和高选择性(er = 89:11)。手性衍生物的 X 射线晶体结构分析证实 R-对映异构体是主要产物。该方法被用作高级手性中间体的途径,该中间体用于平行合成一系列具有药用价值的分子。还描述了用于将叔丁基引入哌嗪氮的化学优化。
The present invention relates to compounds of formula (I)
The compounds act via antagonism of the CCR2b receptor and may be used to treat inflammatory disease and/or neuropathic pain.
[EN] (4-TERT-BUTYLPIPERAZIN-2-YL)(PIPERAZIN-1-YL)METHANONE-N-CARBOXAMIDE DERIVATIVES<br/>[FR] DÉRIVÉS DU (4-TERT-BUTYLPIPÉRAZIN-2-YL)(PIPÉRAZIN-1-YL)MÉTHANONE-N-CARBOXAMIDE
申请人:ASTRAZENECA AB
公开号:WO2010071567A1
公开(公告)日:2010-06-24
The present invention relates to compounds of formula (I) The compounds act via antagonism of the CCR2b receptor and may be used to treat inflammatory disease and/or neuropathic pain.
Novel N-thiazolyl piperazine-1-carboxamide CCR2 antagonists – investigation of an unexpected reaction with glutathione
作者:J. G. Cumming、P. A. MacFaul、A. G. Leach
DOI:10.1039/c5md00362h
日期:——
A series of CCR2 antagonists containing halothiazoles were found to undergo an unexpected reaction with glutathione.