environmentally benign reagent. The mild conditions in this system enable the formylation of a variety of amino acid derivatives including stereochemically labile phenylglycine ethyl ester with 96% ee. This new protocol could also be applied to simple amines including weakly basic aniline derivatives, giving various primary and secondary formamides.
An eco-benign and highly efficient procedure for N-acylation catalyzed by heteropolyanion-based ionic liquids using carboxylic acid under solvent-free conditions
An eco-benign and highly efficient route for N-acylation of amines has been developed by treating amines with corresponding carboxylic acids in the presence of 2 mol % of heteropolyanion-based ionic liquids as catalysts under solvent-free conditions. This practical reaction could tolerate a wide range of substrates. Thus, various N-acylation products including N-acyl alpha-amino acid derivatives were obtained in moderate to excellent yields at 70 degrees C to 120 degrees C. Moreover, recycling studies revealed that heteropolyanion-based ionic liquids were easily reusable for this N-acylation. This method provides a green and much improved protocol over the existing methods.(c) 2014 Elsevier Ltd. All rights reserved.
PROCESS FOR PREPARING REDUCTANTS OF UNSATURATED ORGANIC COMPOUNDS BY THE USE OF TRICHLOROSILANE AND REDUCING AGENTS
申请人:TOKUYAMA CORPORATION
公开号:EP1086941B1
公开(公告)日:2005-08-17
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