Long-acting anticholinesterases for myasthenia gravis: synthesis and activities of quaternary phenylcarbamates of neostigmine, pyridostigmine and physostigmine
作者:Qian-sheng Yu、Harold W. Holloway、Weiming Luo、Debomoy K. Lahiri、Arnold Brossi、Nigel H. Greig
DOI:10.1016/j.bmc.2010.05.022
日期:2010.7
of (−)-phenserine (12), (−)-tolserine (14), (−)-cymserine (16) and (−)-phenethylcymserine (18) were synthesized to produce long-acting peripheral inhibitors of acetylcholinesterase or butyrylcholinesterase. Evaluation of their cholinesterase inhibition against human enzyme ex vivo demonstrated that, whereas compounds 5–8 possessed only marginal activity, 12, 14, 16 and 18proved to be potent anticholinesterases
Inhibition of Human Acetyl- and Butyrylcholinesterase by Novel Carbamates of (−)- and (+)-Tetrahydrofurobenzofuran and Methanobenzodioxepine
作者:Weiming Luo、Qian-sheng Yu、Santosh S. Kulkarni、Damon A. Parrish、Harold W. Holloway、David Tweedie、Avigdor Shafferman、Debomoy K. Lahiri、Arnold Brossi、Nigel H. Greig
DOI:10.1021/jm050578p
日期:2006.4.1
A new enantiomeric synthesis utilizing classical resolution provided two novel series of optically active inhibitors of cholinesterase: (-)- and (+)-O-carbamoyl phenols of tetrahydrofurobenzofuran and methanobenzodioxepine. An additional two series of (-)- and (+)-O-carbamoyl phenols of pyrroloindole and furoindole were obtained by known procedures, and their anticholinesterase actions were similarly
Anticholinesterase Activity of Compounds Related to Geneserine Tautomers. <i>N</i>-Oxides and 1,2-Oxazines
作者:Qian-sheng Yu、Xiaoxiang Zhu、Harold W. Holloway、Noel F. Whittaker、Arnold Brossi、Nigel H. Greig
DOI:10.1021/jm010491d
日期:2002.8.1
between N-oxide and 1,2-oxazine structures in a pH- and time-dependent manner. Assessment by (1)H NMR indicated that the N-oxide structure is adopted at neutral pH and that the compound exists in an equilibrium between several epimers. Evaluation of their biological action to inhibit human acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), ex vivo, demonstrated that the N-oxide (7, 9, 11