Influence of an additional 2-amino substituent of the 1-aminoethyl pharmacophore group on the potency of rimantadine against influenza virus A
摘要:
We examined whether the incorporation of a second amino group into the 1-aminoethyl pharmacophore of rimantadine 2 and into the piperidine pharmacophore of the heterocyclic rimantadine 4 was compatible with anti-influenza virus A activity. The new synthetic molecules are capable of forming two hydrogen bonds within the receptor. We identified molecules 8 and 16, bearing the adamantyl and 1,2-diaminoethyl groups, which are equipotent to rimantadine 2 bearing the adamantyl and I-aminoethyl pharmacophore groups. Interestingly, diamino compound 16 is a 4-fold more potent inhibitor than its parent monoamino, heterocyclic rimantadine 4 propably because of additional hydrogen bonding interactions with the M2 protein receptor. (c) 2006 Elsevier Ltd. All rights reserved.
The Strecker reaction coupled to Viedma ripening: a simple route to highly hindered enantiomerically pure amino acids
作者:Iaroslav Baglai、Michel Leeman、Klaus Wurst、Bernard Kaptein、Richard M. Kellogg、Willem L. Noorduin
DOI:10.1039/c8cc06658b
日期:——
The Strecker reaction is broadly used for the preparation of α-amino acids. However, control of enantioselectivity remains challenging. We here couple the Strecker reaction to Viedma ripening for the absolute asymmetricsynthesis of highly sterically hindered α-amino acids. As proof-of-principle, the enantiomerically pure α-amino acids tert-leucine and α-(1-adamantyl)glycine were obtained.