Dalton Transactions

On the interactions of alkyl 2-hydroxycarboxylic acids with alkoxysilanes 2. Complexation and esterification of di-and tricarboxylic acids

RJ Ansell, JE Meegan, SA Barrett, SL Warrinner

Index: Ansell, Richard J.; Meegan, Jonathan E.; Barrett, Simon A.; Warrinner, Stuart L. Dalton Transactions, 2009 , # 8 p. 1460 - 1470

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Citation Number: 5

Abstract

The selective esterifications of L-malic, L-tartaric and citric acids with tetramethoxysilane Si (OMe) 4, in methanol (MeOH) have been demonstrated for the first time. The interactions between these acids and Si (OMe) 4, and also between oxalic acid and Si (OMe) 4, were investigated using 1H, 13C and 29Si solution phase NMR, and electrospray mass spectrometry (ES-MS). Si (OMe) 4 acts as a catalyst/reagent in the selective esterification ...