Lipase-catalysed synthesis of new acetylcholinesterase inhibitors: N-benzylpiperidine aminoacid derivatives
摘要:
New acetylcholinesterase inhibitors were synthetized via a lipase-mediated regioselective amidation using Candida antarctica lipase B as a biocatalyst in the key step. The new compounds have two different structural fragments: a N-benzylpiperidine moiety to anchor the enzyme active site and a dicarboxylic aminoacid to act as a biological carrier. Some analogues of N-benzylpiperazine were also synthesised and studied but they did not display AChE inhibitor activity. A preliminary structure-activity relationship study was performed employing some computational techniques as similarity indices and electrostatic potential maps. (C) 2000 Published by Elsevier Science Ltd. All rights reserved.
New acetylcholinesterase inhibitors were synthetized via a lipase-mediated regioselective amidation using Candida antarctica lipase B as a biocatalyst in the key step. The new compounds have two different structural fragments: a N-benzylpiperidine moiety to anchor the enzyme active site and a dicarboxylic aminoacid to act as a biological carrier. Some analogues of N-benzylpiperazine were also synthesised and studied but they did not display AChE inhibitor activity. A preliminary structure-activity relationship study was performed employing some computational techniques as similarity indices and electrostatic potential maps. (C) 2000 Published by Elsevier Science Ltd. All rights reserved.
Regioselective Lipase-Catalysed Amidation of DicarboxylicN-Blocked Amino Acid Diesters – Effect of the Side-Chain Length
α-aminopimelic acids yield exclusively the ω-monoamide when they are subjected to amidation catalysed by the lipase B of Candida antarctica in anhydrous diisopropyl ether. These results are in contrast to the α-monoamide yielded by the equivalent L-glutamic derivatives under the same experimental conditions. These results show that the length of the side chain plays a crucial role in the regioselectivity of the