A facile and rapid one-step synthesis of 8-substituted xanthine derivatives via tandem ring closure at room temperature
作者:Prabal Bandyopadhyay、Sumit K. Agrawal、Manisha Sathe、Pratibha Sharma、M.P. Kaushik
DOI:10.1016/j.tet.2012.03.050
日期:2012.5
N-Bromo succinimide (NBS) was found to be an efficient and regioselective reagent in combination with AIBN for an unprecedented, facile and rapid one-step synthesis of 8-substituted xanthine derivatives at room temperature. The inexpensive, nontoxic and readily available NBSefficiently promoted the condensation of several aryl/cycloaryl/heteroaryl aldehydes with 5,6-diamino-1,3-dimethyluracils in
Exploration of polystyrene-supported 2-isobutoxy-1-isobutoxycarbonyl-1,2-dihydroquinoline (PS-IIDQ) as new coupling agent for the synthesis of 8-substituted xanthine derivatives
Polystyrene-supported 2-isobutoxy-1-isobutoxycarbonyl-1,2-dihydroquinoline (PS-IIDQ), a polymer supported covalent coupling reagent, was successfully employed for the first time in the synthesis of 8-substituted xanthine derivatives. PS-IIDQ was observed to be more efficient than IIDQ and polymer-supported carbodiimide (PS-EDC). (C) 2012 Elsevier Ltd. All rights reserved.