Selective urokinase-type plasminogen activator (uPA) inhibitors. Part 1: 2-Pyridinylguanidines
摘要:
The identification of 2-pyridinylguanidines (e.g. 27 and 28) as selective inhibitors of urokinase-type plasminogen activator (uPA) is described. The X-ray crystal structure of 27 has been determined, and modelling has been used to predict binding in the enzyme active site. (C) 2002 Elsevier Science Ltd. All rights reserved.
Copper(II) chloride promoted transformation of amines into guanidines and asymmetrical N,N′-disubstituted guanidines
摘要:
We present a concise, less-toxic and broadly applicable method for coupling weakly nucleophilic amines with N,N'-di-(tert-butoxycarbonyl)thiourea, N-(tert-butxoycarbonyl), N'-alkyl/arylsubstituted-thioureas and N,N'-di-(tert-butoxycarbonyl)imidazolidine-2-thione in the presence of copper(II) chloride. Subsequent removal of Boc protecting groups affords guanidines, di-substituted guanidines and 2-aminoimidazolines in modest to excellent overall yields. (C) 2013 Elsevier Ltd. All rights reserved.