Transacylation of ^|^alpha;-Aryl-^|^beta;-keto Esters
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چکیده
منابع مشابه
An efficient synthesis of aryl a-keto esters
A new one-pot approach for the synthesis of aryl a-keto ester based on the diazo transfer and oxidation of diazo group is developed. 2005 Elsevier Ltd. All rights reserved. 1 3 Ar OMe O [O] Ar OMe O O Ar OMe N2 [O] Base ArSO2N3 a-Keto acids and esters have been important compounds as natural products and as the building blocks in organic synthesis. Over the past decades, various methods have be...
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A novel family of chiral ortho-substituted BINAPO ligands (o-BINAPO) were synthesized from BINOL, and their Ru complexes were highly efficient catalysts for asymmetric hydrogenation of beta-aryl-substituted beta-(acylamino)acrylates and beta-aryl-substituted beta-keto esters. The Ru-bisphosphinite catalysts can tolerate an E/Z mixture of beta-aryl-substituted beta-(acylamino)acrylates. These hi...
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An arylrhodium(I) species selectively reacts with the cyano group of ethyl cyanoformate to afford the corresponding alpha-keto ester in good yield.
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[reaction: see text] The catalytic enantioselective electrophilic fluorination promoted by quaternary ammonium salt from cinchonine as a phase-transfer catalyst is described. Treatment of beta-keto esters with N-fluorobenzenesulfonimide as the fluorine source under mild reaction conditions afforded the corresponding alpha-fluoro beta-keto esters in exellent yields with good to moderate enantiom...
متن کامل1,2-aryl and 1,2-hydride migration in transition metal complex catalyzed diazo decomposition: a novel approach to alpha-aryl-beta-enamino esters.
N-Tosyl diazoketamines were prepared by addition of the ethyl alpha-diazoacetate anion to N-sulfonylimines. The diazo decomposition of the diazoketamines with Rh(2)(OAc)(4) complex resulted in aryl migration to give alpha-aryl-beta-enamino esters in good yields and high stereoselectivity. The effect of the catalysts on the migratory aptitude of 1,2-aryl over 1,2-hydride migration was studied. A...
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ژورنال
عنوان ژورنال: Oleoscience
سال: 2007
ISSN: 1345-8949
DOI: 10.5650/oleoscience.7.151