Removal of the phosphate group in mechanism-based inhibitors of inositol monophosphatase leads to unusual inhibitory activity
作者:David J. Miller、M. Bashir-Uddin Surfraz、Mahmoud Akhtar、David Gani、Rudolf K. Allemann
DOI:10.1039/b312808c
日期:——
Inositolmonophosphatase is widely held to be the therapeutic target for inhibition by lithium ion in the treatment of bipolar disorder. In a continued effort to improve the bioavailability of alternative inhibitors, we have designed and tested two new series of compounds; phosphonates and product-like mimics. Phosphonate substrate mimics were competitiveinhibitors of reduced potency as compared to
Bis-benzyl protected 6-amino cyclitols are poisonous to Pd/C catalysed hydrogenolysis of benzyl ethers
作者:M Bashir-Uddin Surfraz、Mahmoud Akhtar、Rudolf K Allemann
DOI:10.1016/j.tetlet.2003.11.130
日期:2004.2
Pd/C and Pd(OH)(2)/C catalysts are both poisoned by bis-benzyl protected 6-aminocyclitols thereby inhibiting the hydrogenolysis of benzyl ethers but removing N-Cbz groups chemoselectively. This outcome was unaltered by the use of different hydrogen donors. Replacement of the C-6 nitrogen atom by oxygen resulted in the starting materials being fully deprotected under similar conditions. These findings add cyclitolamines to the list of amines/bases that are poisonous to Pd/C catalysts during hydrogenolysis. (C) 2003 Elsevier Ltd. All rights reserved.