Synthesis and 5-lipoxygenase inhibitory activity of 5-hydroperoxy-6,8,11,14-eicosatetraenoic acid analogs
作者:Francis A. J. Kerdesky、Steven P. Schmidt、James H. Holms、Richard D. Dyer、George W. Carter、Dee W. Brooks
DOI:10.1021/jm00390a010
日期:1987.7
A series of eicosatetraenes (2-24) were designed, synthesized, and evaluated in vitro for inhibitory activity against 5-lipoxygenase (20000g supernatant from homogenized rat basophilic leukemia cells). All compounds were found to be active with the potencies (IC50's) ranging from 0.19 to 97 microM. Compounds containing the hydroxamic acid functionality (10-12) exhibited the best activity (IC50 = 0.19-2.8 microM). The most potent inhibitor was 5-[(hydroxyamino)carbonyl]methyl]-6,8,11,14-eicosatetraenoic acid (11), which was 10 times more active than the C-1 hydroxamates of arachidonic acid or 5-HETE. Cyclization of the linear eicosanoids 2 and 14 in the C-1 to C-5 region produced compounds (21 and 24, respectively) with several-fold greater potency.
Eicosatetraenehydroxamates: inhibitors of 5-lipoxygenase
作者:F.A.J. Kerdesky、J.H. Holms、S.P. Schmidt、R.O. Dyer、G.W. Carter
DOI:10.1016/s0040-4039(00)98946-9
日期:1985.1
Oxidative Conversion of Silyl Enol Ethers to α,β-Unsaturated Ketones Employing Oxoammonium Salts
The oxidative conversion of silylenolethers to α,β-unsaturated ketones using a less-hindered class of oxoammonium salts (AZADO+BF4–) is described. The reaction proceeds via the ene-like addition of oxoammonium salts to silylenolethers.
Sulfoniosilylation of α,β-unsaturated carbonyl compounds. Facile nucleophilic substitution of 3-trialkylsilyloxyalk-2-enylenesulfonium salts
作者:Sunggak Kim、Joo Hyeon Park、Yong Gil Kim、Joo Moon Lee
DOI:10.1039/c39930001188
日期:——
Sulfoniosilylation of α,β-enones and α,β-enals with trialkylsilyl triflate and dimethyl sulfide at â78°C affords 3-trialkylsilyloxyalk-2-enylenesulfonium salts, which undergo facile nucleophilic substitution with various nucleophiles.