Investigations Towards the Chemoselective Thioacetaliztion of Carbonyl Compounds by Using Ionic Liquid[bmim]Br as a Recyclable Catalytic Medium
作者:Ahmed Kamal、Gagan Chouhan
DOI:10.1002/adsc.200303171
日期:2004.4
The ionicliquid based on the 1-n-butyl-3-methylimidazolium cation has been prepared and used as an efficient catalytic medum for the chemoselective thioacetalization of carbonylcompounds. Furthermore, recycling and reuse of this ionicliquidmedium has been demonstrated. Moreover, the use of this catalyticmedium not only avoids the generation of waste but also provides a green process with minimal
Chemoselective thioacetalization and transthioacetalization of carbonyl compounds catalyzed by immobilized scandium(III) triflate in ionic liquids
作者:Ahmed Kamal、Gagan Chouhan
DOI:10.1016/s0040-4039(03)00580-x
日期:2003.4
Immobilized scandium triflate [Sc(OTf)(3)] in ionic liquids has been found to be an extremely efficient and recyclable catalyst for the thioacetalization and transthioacetalization of both aromatic and aliphatic aldehydes. Significant rate acceleration and chemoselectivity was achieved by employing this catalytic system. (C) 2003 Elsevier Science Ltd. All rights reserved.