Abstract
Starch laurates with average degrees of substitution (DS) from 0.63 to 2.52 are obtained applying three equivalents lauroyl chloride per anhydroglucose unit (AGU). Different solvents, that is, N,N‐dimethylacetamide (DMAc), DMAc/LiCl, and N,N‐dimethylformamide (DMF)/LiCl are studied as reaction medium without and with a base. In the presence of pyridine, products of highest DS and degree of polymerization (DP) are accessible. Nuclear magnetic resonance (NMR) and Fourier Transform Infrared Spectroscopy (FTIR) reveal the presence of acetate moieties that could be caused by O‐acyl‐dimethylacetiminium generated from DMAc in a side reaction. No side reaction is found to occur in the presence of triethylamine and triphenylphosphane. Furthermore, no side reactions are detected in DMF/LiCl as solvent.
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