Discovery of N-Hydroxy-2-(2-oxo-3-pyrrolidinyl)acetamides as potent and selective inhibitors of tumor necrosis factor-α converting enzyme (TACE)
摘要:
New inhibitors of tumor necrosis factor-a converting enzyme (TACE) were discovered using an N-hydroxy-2-(2-oxo-3-pyrrolidinyl)acetamide scaffold. The series was found to be potent in a porcine TACE (pTACE) assay with IC50S typically below 5 nM. For most compounds, selectivity for pTACE relative to MMP-1,-2, and -9 is at least 300-fold. Compound 2o was potent in inhibition of TNFalpha production in a human whole blood assay (WBA) with an IC50 of 0.42 muM. (C) 2003 Elsevier Science Ltd. All rights reserved.
Bakers’ yeast reduces esters of 2-alkyl-3-oxobutanoic acid (CH3COCHRCO2R′; R=methyl, ethyl, propyl, propargyl, and allyl) into the corresponding (S)-hydroxy esters with exclusive stereoselectivity, while the configuration at the 2-position of the hydroxy esters is either S (anti) or R (syn) depending on the structure of the alkoxyl group in the carboalkoxyl moiety of the ester. Oftenly, the stereoselectivity
Metachloropehoxybenzoic acid promoted stereoselective synthesis of 2,5-disubstituted tetrahydrofurans from α or γ-allyl-β-hydroxy esters: A formal synthesis of (±) methyl nonactate
作者:Javed Iqbal、Anu Pandey、Bhanu P.S Chauhan
DOI:10.1016/s0040-4020(01)86451-6
日期:1991.1
A one pot stereoselectivesynthesis of cis or trans 2,5-disubstituted tetrahydrofurans 3–8 can be achieved in high yields via electrophilic cyclisation of the corresponding cis or trans α or γ-allyl-β-hydroxyesters mediated by metachloroperoxybenzoic acid. The tetrahydrofurans 5 or 6 may be converted into (±) methylnonactate by procedures described earlier. The role of methoxycarbonyl group during
Ring enlargement by alkylated 3-hydroxybutyrates: A synthesis of (12s, 13r)-(−)-12-methyl-13-tetradecanolide 1
作者:Philip Kraft、Werner Tochtermann
DOI:10.1016/0040-4020(95)00664-t
日期:1995.10
TBS-protected iodo alkohols 6 were prepared via Fráter alkylation and applied hi the synthesis of optically active macrohdes 5 and 10. By ringenlargement of cyclodecanone (7) the superposition molecule 5 of two macrocyclic odorants was synthesized and a conformationally fixed tricyclic macrolide11 constructed.