- ENANTIOSELECTIVE SYNTHESIS OF γ-AMINO-α,β-UNSATURATED CARBOXYLIC ACID DERIVATIVES
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Provided is an enantioselective, palladium-catalyzed method for the preparation of γ-amino-α,β-unsaturated carboxylic acid derivatives having the formulas II, III, IV and VIII.
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Page/Page column 35-36
(2010/06/15)
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- A highly stereoselective ether directed palladium catalysed aza-Claisen rearrangement
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A highly stereoselective rearrangement of allylic trichloroacetimidates to allylic trichloroamides has been achieved using adjacent ether groups to direct facial coordination of the palladium(II) catalyst. The Royal Society of Chemistry 2005.
- Jamieson, Andrew G.,Sutherland, Andrew
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p. 735 - 736
(2007/10/03)
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- Nitroalkanes and ethyl glyoxalate as common precursors for the preparation of both β-keto esters and α,β-unsaturated esters
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β-Nitro acrylic esters, obtained by the reaction of nitroalkanes and ethyl glyoxalate, are the key building blocks for the immediate synthesis of both the title compounds. In fact, their treatment with titanium trichloride produce the direct conversion to the β-keto esters, while their reaction with sodium boron hydride gives the one-pot synthesis of α,β- unsaturated esters through formal substitution of the vinylic nitro group with an hydrogen.
- Ballini, Roberto,Fiorini, Dennis,Palmieri, Alessandro
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p. 7027 - 7029
(2007/10/03)
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- Flexible and simple route for the stereoselective synthesis of trisubstituted γ-butyrolactones: Total synthesis of (+)-blastomycinone and its analogs
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A flexible route for the stereoselective synthesis of trisubstituted γ-butyrolactones, namely (+)-blastomycinone and its analogs, is devised by the Sharpless asymmetric epoxidation and the regioselective ring opening reaction with dibutylcopper lithium as
- Krishna, Palakodety Radha,Reddy, V. V. Ramana,Sharma
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p. 2107 - 2114
(2007/10/03)
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- Diastereoselective synthesis of enantiopure 5-[2-(alkoxyalkyl)-1- (hydroperoxypropyl)]-3-alkoxycarbonyl-2-alkyl furans
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The diastereoselective approach to enantiomerically pure furyl hydroperoxides of general type 1 has been accomplished starting from (S)-(- )-ethyl lactate. In the first part of the synthesis the alkylating reagents 7a,b were efficiently produced to be use
- Lattanzi, Alessandra,Sagulo, Francesco,Scettri, Arrigo
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p. 2023 - 2035
(2007/10/03)
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- CATALYTIC OSMYLATION OF ELECTRON POOR ALLYLIC ALCOHOLS AND ETHERS. A SYNTHETIC APPROACH TO BRANCHED CHAIN SUGARS
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The catalytic osmylation of electron-poor allylic ethers and alcohols was studied.In the case of γ-alkoxy E-enoates reaction selectivity was found to range from 2:1 to 8:1 in favor of the arabino (2,3-syn - 3,4-anti) product, regardless of the double bond
- Bernardi, Anna,Cardani, Silvia,Scolastico, Carlo,Villa, Roberto
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p. 491 - 502
(2007/10/02)
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- INTRAMOLECULAR NITRILE OXIDE CYCLOADDITION ON CHIRAL OLEFINS : A STEREOCONTROLLED APPROACH TO β-KETOL PRECURSORS.
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The intramolecular nitrile oxide cycloaddition reaction on (E) or (Z) olefins featuring a sulphur atom along the carbon chain connecting dipole and dipolarophile occurs with a poor to excellent anti stereoselectivity, which is mainly affected by the subst
- Annunziata, Rita,Cinquini, Mauro,Cozzi, Franco,Dondio, Gulio,Raimondi, Laura
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p. 2369 - 2380
(2007/10/02)
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