Proline–cyclodextrin conjugates: synthesis and evaluation as catalysts for aldol reaction in water
摘要:
The synthesis of six conjugates of L-proline and beta-cyclodextrin and their evaluation as catalysts of aldol reaction in water are described. The results indicated that the nature of the linker between proline and beta-cyclodextrin is important for catalytic activity: the one with the most flexible linker gave the best results. Inhibition experiments showed that the cavity of beta-cyclodextrin plays a role in the catalysis. Permethylation of the cyclodextrin hydroxyl groups led to higher conversion rates. (C) 2012 Elsevier Ltd. All rights reserved.