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G. Yu. Ishmuratov A. V. Bannova E. R. Latypova R. R. Muslukhov A. A. Smol′nikov R. F. Talipov 《Chemistry of Natural Compounds》2012,48(5):789-790
A modified stereospecific synthesis of potentially biologically and pharmacologically active methyl (1R,2R,3E,5R)-3-(hydroxyimino)-5-methyl-2-(1-methylethyl)cyclohexanecarboxylate from (R)-4-menthen-3-one was developed using sequential 1,4-conjugate addition of Norman reagent catalyzed by CuI?CBF3?Et2O?CCuCl2 and ozonolysis?Creduction of the intermediate (R,R,R)-vinylmenthone by hydroxylamine hydrochloridein MeOH. 相似文献
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Novel dihydroiridium(III) complexes containing mono- and bi-dentate sulfur ligands have been isolated. The cationic complexes [Ir(COD)L2]ClO4 (COD = 1,5-cyclooctadiene, L = tetrahydrothiophene (tht) or trimethylene sulfide (tms); L2 = (CH3S)2(CH2)3 (dth)), [Ir(COD)(L-L)]2(ClO4)2 (L-L = 1,4-dithiacyclohexane (dt) or (t-BuS)2(CH2)2 (tmdto)) and [Ir(CO)2(tmdto)]2-(ClO4)2 react with H2 to give the corresponding iridium(III) dihydrides: [IrH2COD)L2]ClO4 (Ia: L = tht, Ib: L = tms, Ic: L2 = dth), [IrH2(COD)-(L-L)]2(ClO4)2 (IIa: L-L = tmdto, IIb: L-L = dt) and [IrH2(CO)2(tmdto)]2-(ClO4)2 (III). The 1H NMR chemical shifts and ν(IrH) data are discussed. 相似文献
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F. Makaev L. Bets L. Vlad S. Pogrebnoi A. Barba A. Besolov S. Malinovskii R. Lyubodarskii 《Russian Journal of Organic Chemistry》2006,42(6):849-854
A procedure was developed for the stereoselective synthesis of aminated derivatives of (+)-1-{(1R,3R,6S)-4,7,7-trimethylbicyclo[4.1.0]hept-4-en-3-yl}ethan-1-one. The configuration of the side-chain chiral center in (+)-1-{(1R,3R,6S)-4,7,7-trimethylbicyclo[4.1.0]hept-4-en-3-yl}ethan-1-ol was determined by X-ray analysis. Diketene and Meldrum’s acid were proposed as initial compounds for the synthesis of, respectively, 3-oxobutanoic and malonic acid esters having a 1-ethyl-4,7,7-trimethylbicyclo[4.1.0]hept-4-ene fragment. 相似文献
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