Benzimidates can be reacted with a large number of nucleophiles, leading to a wide variety of products. The present invention discloses a facile synthesis for ethyl 2,4-dihydroxybenzimidate, and ethers and diethers thereof, from 2,4-dihydroxybenzoic acid or 2,4-dibenzyloxybenzoic acid. The present invention also discloses a method of preparing a class of iron chelating agents related to desferrithiocin, all of which contain a thiazoline ring. In this method, 2,4-dihydroxybenzonitrile is condensed with (S)-2-methylcysteine.
[EN] SYNTHESIS OF BENZONITRILES AND BENZIMIDATES<br/>[FR] SYNTHESE DE BENZONITRILES ET DE BENZIMIDATES
申请人:GENZYME CORP
公开号:WO2003097582A2
公开(公告)日:2003-11-27
Benzonitrites and benzimidates represent important intermediates and starting materials, which are typically not commercially available. The present invention discloses a facile synthesis for 2,4-dihydroxybenzonitrile, and ethers and diethers thereof, from 2,4-dihydroxybenzoic acid and from 2,4-dihydroxybenzaldehyde. In addition, the invention discloses a method of preparing substituted benzimidates from substituted benzoic acid. The present invention also discloses a method of preparing a class of iron chelating agents related to desferrithiocin, all of which contain a thiazoline ring. In this method, 2,4-dihydroxybenzonitrile or an alkyl 2,4-dihydroxybenzonitrile or an alkyl 2,4-dihydroxybenzimidate is condensed with (S)-2-methylcysteine.