Metal zinc-promoted gem -bisallylation of acid chlorides with allyl chlorides in the presence of chlorotrimethylsilane
摘要:
Treatment of acid chlorides (2) with allyl chlorides (1) in the presence of zinc dust and a catalytic amount of chlorotrimethylsilane (TMSCl) in THF brought about highly facile and effective coupling to give the corresponding gem-bisallylation products. 4-hydroxy-penta-1,6-dienes (3), in good to excellent yields. These reactions are assumed to proceed through allylzinc intermediates generated in situ. (C) 2002 Elsevier Science Ltd. All rights reserved.
γ-Substituted Secondary Organoalkaline Compounds and their Chlorinated Precursors: Synthetic Applications
作者:José Barluenga、Josefa Flórez、Miguel Yus
DOI:10.1055/s-1985-31362
日期:——
The prepartion of γ-functionalised secondary organolkaline metal compounds starting from methyl 3-chlorobutanoate (obtained by addition of hydrogen chloride to commercially available methyl trans-2-butenoate) is described. Reactions of these metallated compounds with suitable electrophilic reagents leads to a variety of tertiary alcohol derivatives.
ALLYLATION OF ESTERS PROMOTED BY METALLIC DYSPROSIUM IN THE PRESENCE OF MERCURIC CHLORIDE
作者:Yu Jia、Mingfu Zhang、Fenggang Tao、Jingyao Zhou
DOI:10.1081/scc-120006467
日期:2002.1
ABSTRACT In the presence of mercuric chloride, the reactions of esters with allyl bromide and metallic dysprosium in anhydrous THF give diallyl alkyl carbinols in good yields. When γ-butyrolactone is used as the substrate, the corresponding product is 4-allyl-6-heptene-1, 4-diol.
Hypocholesterolemic agents VII: Inhibition of β-hydroxy-β-methylglutaryl-CoA reductase by monoesters of substituted glutaric acids
作者:Marvin R. Boots、Yeong-Maw Yeh、Sharon G. Boots
DOI:10.1002/jps.2600690507
日期:1980.5
A series of 1-(4-biphenylyl)pentyl hydrogen 3-alkylglutarates and 3-hydroxy-3-alkylglutarates was synthesized and assayed for inhibition of rat liver beta-hydroxy-beta-methylglutaryl-CoA reductase. Limited solubility of the monoesters in the enzyme assay system prevented the determination of the I50 values. However, the limited data indicated no significant changes in the activity of the analogs when
3-Alkyl-3-hydroxyglutaric Acids: A New Class of Hypocholesterolemic HMG CoA Reductase Inhibitors. 1
作者:John S. Baran、Ivar Laos、Donna D. Langford、James E. Miller、Charlene Jett、Beatrice Taite、Elaine Rohrbacher
DOI:10.1021/jm50001a011
日期:1985.5
Derivatives of 3-hydroxy-3-methylglutaric acid (HMG), a portion of the substrate for HMG CoA reductase, were prepared and tested for their inhibitory action against rat liver HMG CoA reductase and for their hypocholesterolemic activity. Structure-dependent competitive inhibition was observed. Optimal structures had a free dicarboxylic acid with an alkyl group of 13-16 carbons at position 3. 3-n-Pentadecyl-3-hydroxyglutaric acid (3j) (IC50 = 50 microM) reduced serum cholesterol in the Triton-treated rat and HMG CoA reductase activity in the 20,25-diazacholesterol-treated rat.
Saizew,P.u.A., Justus Liebigs Annalen der Chemie, 1878, vol. 193, p. 362