Electrophilic substitution of imidazo[2,1-b]oxazoles
作者:Belew Mekonnen、George Crank
DOI:10.1016/s0040-4020(97)00395-5
日期:1997.5
The electrophilic substitutions of di and tri substituted imidazo[2,1-b]oxazoles were studied. Mannich, bromination, nitration, and the Vilsmeier-Haack formylation reactions occur at position-5 of this ring system to give a range of products in high yield.
研究了二和三取代的咪唑并[2,1- b ]恶唑的亲电取代。曼尼希(Mannich),溴化,硝化和Vilsmeier-Haack甲酰化反应发生在该环系统的5位,从而提供了一系列高收率的产品。
[EN] COMPOUNDS FOR TREATING DUCHENNE MUSCULAR DYSTROPHY<br/>[FR] COMPOSÉS POUR TRAITER LA DYSTROPHIE MUSCULAIRE DE DUCHENNE
申请人:SUMMIT CORP PLC
公开号:WO2009013477A1
公开(公告)日:2009-01-29
Compounds of general formula (I), wherein X1, X2, X3, R1, R2, R3, Y and Z are as defined herein are useful for the treatment and prevention of Duchenne muscular dystrophy, Becker muscular dystrophy and cachexia.
An extension of the ‘Cusmano–Ruccia’ reaction is reported. 6-(4-chlorophenyl)-3-methyl-5-nitrosoimidazo[2,1-b]oxazole by the action of hydrochloricacid gives 3-(4-chlorobenzoyl)-5-methyl-1,2,4-oxadiazole (13); presumably via ammonium ion, CO2 and methanol elimination. The relevance of the nature of the atom of the B-ring linked to C-2 of the imidazole for the occurrence of the ring-into-ring interconversion
据报道,“ Cusmano-Ruccia”反应扩展了。6-(4-氯苯基)-3-甲基-5-硝基磺酰咪唑并[2,1- b ]恶唑在盐酸的作用下得到3-(4-氯苯甲酰基)-5-甲基-1,2,4-恶二唑(13); 大概是通过铵离子,CO 2和甲醇消除。与咪唑的C-2连接的B环的原子的性质与环到环的相互转化的发生的相关性再次得到证实。
A new and facile synthesis of imidazo[2,1-<i>b</i>]oxazoles
作者:Belew Mekonnen、George Crank、Donald Craig
DOI:10.1002/jhet.5570340241
日期:1997.3
An efficient and clean two step procedure for the synthesis of imidazo[2,1-b]oxazoles has been developed from 2-aminooxazoles using titanium(IV) chloride assisted cyclization, and a variety of imidazo[2,1-b]oxazoles have been synthesized in good yields. The structure of one of the products was confirmed by X-ray crystallographic analysis.
利用氯化钛(IV)辅助环化反应,从2-氨基恶唑开发了一种高效,清洁的两步合成咪唑并[ 2,1- b ]恶唑的方法,各种咪唑并[ 2,1- b ]恶唑具有以高收率合成。通过X射线晶体学分析证实了一种产物的结构。