Inhibition of liver alcohol dehydrogenase and ethanol metabolism by 3-substituted thiolane 1-oxides
摘要:
3-Substituted thiolane 1-oxides (methyl, n-butyl, n-hexyl, and phenyl) were prepared and tested as inhibitors of horse, monkey, and rat liver alcohol dehydrogenases and of ethanol metabolism in rats. These compounds inhibit alcohol oxidation in an uncompetitive manner with respect to ethanol as a varied substrate. Lengthening the alkyl substituent increased the inhibitory potency because of tighter binding in the hydrophobic substrate binding pocket of the alcohol dehydrogenases. Thus, the 3-hexyl derivative was the most potent inhibitor of the purified rat liver alcohol dehydrogenase, with a Kii value of 0.13 microM. The 3-butyl derivative was the best inhibitor of ethanol metabolism in rats, with a Kii value of 11 mumol/kg. The acute toxicity in mice of the butyl derivative was 1.4 mmol/kg. Since high concentrations of alcohol do not prevent the inhibitory effects of these compounds, they may be particularly useful for preventing poisoning by methanol or ethylene glycol.
Inhibition of liver alcohol dehydrogenase and ethanol metabolism by 3-substituted thiolane 1-oxides
摘要:
3-Substituted thiolane 1-oxides (methyl, n-butyl, n-hexyl, and phenyl) were prepared and tested as inhibitors of horse, monkey, and rat liver alcohol dehydrogenases and of ethanol metabolism in rats. These compounds inhibit alcohol oxidation in an uncompetitive manner with respect to ethanol as a varied substrate. Lengthening the alkyl substituent increased the inhibitory potency because of tighter binding in the hydrophobic substrate binding pocket of the alcohol dehydrogenases. Thus, the 3-hexyl derivative was the most potent inhibitor of the purified rat liver alcohol dehydrogenase, with a Kii value of 0.13 microM. The 3-butyl derivative was the best inhibitor of ethanol metabolism in rats, with a Kii value of 11 mumol/kg. The acute toxicity in mice of the butyl derivative was 1.4 mmol/kg. Since high concentrations of alcohol do not prevent the inhibitory effects of these compounds, they may be particularly useful for preventing poisoning by methanol or ethylene glycol.
Zirconium-catalyzed preparation of aluminacyclopentanes and synthesis of five-membered carbo- and heterocycles
作者:Usein M Dzhemilev、Askhat G Ibragimov、Ruslan R Gilyazev、Leila O Khafizova
DOI:10.1016/j.tet.2003.10.082
日期:2004.2
Novel ‘one-pot’ catalytic methods for the synthesis of cyclopentanols, tetrahydrothiophenes, silacyclopentanes and phospholanes are based on successive transformations of olefins and organoaluminium compounds (R2AlR′) in the presence of Cp2ZrCl2 catalyst. In situ generated aluminacyclopentanes serve as common intermediates in these processes.
Inhibition of alcohol metabolism by tetramethylene sulfoxides
申请人:University of Iowa Research Foundation
公开号:US04482568A1
公开(公告)日:1984-11-13
Tetramethylene sulfoxide and its substituted derivatives have been found to be exceptionally potent inhibitors of oxidation of alcohols by liver alcohol dehydrogenases.
四亚甲基亚砜及其衍生物已被发现是肝脏酒精脱氢酶氧化醇的非常强效抑制剂。
Process for the carbonylation of alkanols and/or ethers
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0042633A1
公开(公告)日:1981-12-30
Process forthe carbonylation of alkanols and/or ethers at elevated temperature and pressure in the presence of a Group VIII metal compound and pentachlorobenzenethiol and/or salts thereof, using a pentachlorobenzenethiol compound : Group VIII metal compound molar ratio of not more than 10. The process is of special interest for the production of methyl acetate from methanol using an active, iodine-free catalytic system.
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0071286A1
公开(公告)日:1983-02-09
A process for the oxidative carbonylatioh of an alcohol to produce a carbonate, which comprises reacting together carbon monoxide, oxygen and an alcohol, in the presence of a copper compound and in the presence of a sulphone.
一种将醇氧化羰基化生成碳酸盐的工艺,包括一氧化碳、氧气和醇在铜化合物和砜的存在下一起反应。
Process for hydration of olefins
申请人:TOA NENRYO KOGYO KABUSHIKI KAISHA
公开号:EP0127486A1
公开(公告)日:1984-12-05
An improved process for producing an alcohol by hydrating an olefin wherein the improvement comprises hydrating an olefin in the presence of a hydrogen-type catalyst having a silica/alumina molar ratio of 20 to 500 and a solvent using either:
A. hydrogen-type mordenite or hydrogen-type zeolite Y, and a sulfone; or
B. hydrogen-type crystalline aluminosilicate in which the entrance of the main void is formed by a 10-membered or 12-membered oxygen ring, and a C2 to C5 oxy acid or the lactones, lactides, methyl or ethyl esters thereof.
一种通过水合烯烃生产醇的改进工艺,其改进包括在二氧化硅/氧化铝摩尔比为 20 至 500 的氢型催化剂和溶剂存在下水合烯烃:
A. 氢型莫来石或氢型沸石 Y,以及砜;或
B. 氢型结晶铝硅酸盐,其中主空隙入口由 10 元或 12 元氧环和 C2 至 C5 氧酸或其内酯、内酯、甲基或乙基酯形成。