Carbamates with Differential Mechanism of Inhibition Toward Acetylcholinesterase and Butyrylcholinesterase
作者:Sultan Darvesh、Katherine V. Darvesh、Robert S. McDonald、Diane Mataija、Ryan Walsh、Sam Mothana、Oksana Lockridge、Earl Martin
DOI:10.1021/jm8002075
日期:2008.7.1
Most carbamates are pseudoirreversible inhibitors of cholinesterases. Phenothiazine carbamates exhibit this inhibition of acetylcholinesterase but produce reversible inhibition of butyrylcholinesterase, suggesting that they do not form a covalent bond with the catalytic serine. This atypical inhibition is attributable to pi-pi interaction of the phenothiazine moiety with F329 and Y332 in butyrylcholinesterase
In a process for preparing p-dichlorobenzene by nuclear chlorination of benzene and/or chlorobenzene as the starting material with chlorine molecules, chlorination is carried out using aluminum chloride in an amount of 0.1-3 millimols per mol of the starting material and phenothiazines such as
10
H-phenothiazine-10-carboxylic acid phenyl ester in an amount of 0.1-0.9 mols per mol of aluminum chloride so as to be a chlorination degree in a range of 1.2-2.5, by which p-dichlorobenzene can be obtained in a high para-selectivity and a short reaction time.