KOH-mediated intramolecular amidation and sulfenylation: A direct approach to access 3-(arylthio)imidazo[1,2-a]pyridin-2-ols
作者:Khima Pandey、Vikki N. Shinde、Krishnan Rangan、Anil Kumar
DOI:10.1016/j.tet.2020.131499
日期:2020.10
A simple and facile method for the synthesis of 3-(arylthio)imidazo[1,2-a]pyridin-2-ols has been developed by a KOH-mediated reaction of 2-aminopyridinium bromides with aryl thiols. The method afforded a wide range of 3-(arylthio)imidazo[1,2-a]pyridin-2-ols in moderate to excellent (56–95%) yields with excellent functional group tolerance. Synthetic utility of the protocol was demonstrated by gram-scale
通过KOH介导的2-氨基吡啶溴化物与芳基硫醇的反应,已经开发出一种简单且简便的合成3-(芳硫基)咪唑并[1,2 - a ]吡啶-2-醇的方法。该方法以中等至优异的产率(56–95%)提供了范围广泛的3-(芳硫基)咪唑并[1,2 - a ]吡啶-2-醇,并具有出色的官能团耐受性。该协议的合成效用通过革兰氏规模的反应和制备的2-芳基-3-(证明p -tolylthio)咪唑并[1,2一]从3-(吡啶p -tolylthio)咪唑并[1,2一]吡啶-2-醇。
A Facile Synthesis of 3‐(Arylthio)imidazo[1,2‐
<i>a</i>
]pyridin‐2(3H)‐ones from 2‐Aminopyridinium Bromides and Sodium Arenesulfinates
作者:Saroj、Krishnan Rangan、Anil Kumar
DOI:10.1002/ejoc.202000996
日期:2020.12.7
Synthesis of 3‐(arylthio)imidazo[1,2‐a]pyridin‐2(3H)‐ols has been achieved through a catalyst‐free, one‐potreaction of 2‐aminopyridinium bromides with sodium arenesulfinates. The tandem reaction involved intramolecular amidation followed by sulfenylation and afforded a wide range of 3‐(arylthio)imidazo[1,2‐a]pyridin‐2(3H)‐ols in moderate to excellent (33–85 %) yields. The method exhibited broad substrate
通过无催化剂的2-氨基吡啶溴化物与芳烃亚磺酸钠的一锅反应,可以合成3-(芳硫基)咪唑并[1,2 - a ]吡啶-2(3H)-醇。串联反应涉及分子内酰胺化,然后进行亚磺酰化,并以中等至极好(33-85%)的产率提供了多种3-(芳硫基)咪唑并[1,2 - a ]吡啶-2(3H)-醇。该方法具有广泛的底物范围,具有宽泛的官能团耐受性,适用于克级合成。
POLYSUBSTITUTED DERIVATIVES OF 2-HETEROARYL-6-PHENYLIMIDAZO[1,2-a]PYRIDINES, AND PREPARATION AND THERAPEUTIC USE THEREOF
申请人:DE PERETTI Danielle
公开号:US20110065727A1
公开(公告)日:2011-03-17
Compounds of formula (I):
wherein R, R
1
, R
2
, R
3
, R
4
and X are as defined in the disclosure, or an acid addition salt thereof, and the therapeutic use and process of synthesis thereof.
Polysubstituted derivatives of 2-heteroaryl-6-phenylimidazo[1,2-a]pyridines, and preparation and therapeutic use thereof
申请人:Sanofi
公开号:US08338451B2
公开(公告)日:2012-12-25
Compounds of formula (I):
wherein R, R1, R2, R3, R4 and X are as defined in the disclosure, or an acid addition salt thereof, and the therapeutic use and process of synthesis thereof.