Design of a novel cognitive enhancer (8S, 10aS)-8-carbamoyl-1,2,3,6,7,8,9,10a-octahydro-5H,10H-pyrrolo[1,2-a][1,4]diazocin-5,10-dione
摘要:
A new cognitive enhancer (8S, 10aS)-8-carbamoyl-1,2,3,6,7,8,9,10a-octahydro-5H, 10H-pyrrolo[1,2-a][1,4]diazocin-5,10-dione (3) has been designed based on the approach consisting of two steps: 1) ''obligatory'' replacement of histidine with glutamine in TRH; 2) the application of conformational constraints for putative bioactive conformation of [Gln(2)]-TRH. 3 reversed on 100% electroconvulsive shock-induced amnesia at doses of 0.1 and 1.0 mg/kg and on 83% scopolamine-induced amnesia at a dose of 1 mg/kg, using passive avoidance test. Copyright (C) 1996 Elsevier Science Ltd
A series of novel chiral metal-containing ionic liquids (CMILs) consisting of the cation of crown ether-chelated potassium/sodium and the anion of chiral amino acids were designed and synthesized. These new CMILs were used to catalyze the enantioselective cycloaddition of epoxides and carbon dioxide incorporating with the salenCo(OOCCCl3) to generate corresponding chiral cyclic carbonates under mild conditions. These new catalysts can be recycled at least five times without significant loss of activity and enantioselectivity.