Iron-catalyzed alkenylation of Grignard reagents by enol phosphates
Stereoselective preparation of trisubstituted olefins can be easily performed from an Z/E-mixture of enol phosphates by reacting only the E-isomer with a Grignard reagent in the presence of Fe(acac)3. This procedure combines a kinetic differentiation and a stereoselective reaction. The coupling is very chemoselective in the presence of an alkyl chloride, an ester, a ketone or a nitrile. Georg Thieme Verlag Stuttgart.
Cahiez, Gerard,Gager, Olivier,Habiak, Vanessa
experimental part
p. 2636 - 2644
(2009/04/07)
Mannich/Friedel-Crafts Preparations of 1-(Arylmethyl)benzotriazoles and Synthetic Transformations of their Lithio Derivatives
The synthesis of 1-(arylmethyl)benzotriazoles by Mannich type reactions of benzene, toluene, p-xylene and chlorobenzene with 1-chloromethylbenzotriazole in the presence of aluminium halides is reported.Alkylation of their lithio derivatives followed by th
Katritzky, Alan R.,Gordeev, Mikhail F.,Greenhill, John V.,Steel, Peter J.
p. 1111 - 1118
(2007/10/02)
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