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Easy Approach (easy + approach)
Selected AbstractsRadical Cyclization of , -Bromo Aluminum Acetals: An Easy Approach to , -Lactols,ANGEWANDTE CHEMIE, Issue 50 2009Anne Boussonnière Ringe um Aluminium: Ein effizientes Verfahren zur Radikalcyclisierung von , -Bromestern ist die hier beschriebene Reduktion der Ester mit DIBAL-H bei niedriger Temperatur zu Aluminiumacetalen, die in Gegenwart von nBu3SnH und Et3B cyclisieren (siehe Schema). Diese Eintopfumsetzung liefert polysubstituierte , -Lactole in hohen Ausbeuten, und die milden Reaktionsbedingungen ermöglichen die Synthese von säureempfindlichen Derivaten. [source] ChemInform Abstract: Radical Cyclization of ,-Bromo Aluminum Acetals: An Easy Approach to ,-Lactols.CHEMINFORM, Issue 14 2010Anne Boussonniere Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: An Easy Approach to ,,,-Unsaturated ,-Thiolactams via a RCM and Thionation One-Pot Procedure.CHEMINFORM, Issue 15 2009Jacek G. Sosnicki Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] New Easy Approach to the Synthesis of 2,5-Disubstituted and 2,4,5-Trisubstituted 1,3-Oxazoles.CHEMINFORM, Issue 37 2006The Reaction of 1-(Methylthio)acetone with Nitriles. Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] An Easy Approach to Optically Active ,-Amino Phosphonic Acid Derivatives by Chiral Zn(II)-Catalyzed Enantioselective Amination of Phosphonates.CHEMINFORM, Issue 38 2005Luca Bernardi Abstract For Abstract see ChemInform Abstract in Full Text. [source] Easy approach to chiral Michael adducts by Eu+3 -catalyzed conjugate additionCHIRALITY, Issue 7 2003Margherita De Rosa Abstract Michael addition of enantiopure N-acetoacetyl-oxazolidin-2-ones is shown to take place in the presence of catalytic amounts of Eu+3 salts and complexes in high yields, very reduced reaction times, and moderate diastereoselectivity. The level of diastereoselectivity can be significantly enhanced by the suitable exploitation of the easy epimerization of the adducts in the presence of silica gel. Chirality 15:579,583, 2003. © 2003 Wiley-Liss, Inc. [source] Aluminium Powder-Catalyzed Regio- and Stereoselective Aminobromination of ,,,-Unsaturated Carbonyl Compounds and Simple Olefins with the p -Toluenesulfonamide/ N -Bromosuccinimide (TsNH2 -NBS) SystemADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 14-15 2009Zhan-Guo Chen Abstract The regio- and stereoselective aminobromination of ,,,-unsaturated carbonyl compounds and simple olefins catalyzed by elementary aluminium powder has been established by using p -toluenesulfonamide (TsNH2) and N -bromosuccinimide (NBS) as the nitrogen/bromine sources. The reaction was convenient to carry out with a loading of 1,mol% catalyst at room temperature without inert gas protection. This method provides an easy approach to trans vicinal haloamino derivatives of ,,,-unsaturated carbonyl compounds and simple olefins in high yields (up to 99.8%) and in excellent regio- and stereoselectivities. The electron-rich and electron-deficient olefins show significant differences in activity to the aminobromination reaction and give the opposite regioselectivities. Two possible pathways involving separately a bromonium or an aziridinium intermediate have been proposed. [source] | ||||||||||