Abstract
Racemic 2-iodomandelic acid 1 was synthesized from commercially available 2-iodobenzoic acid 2. Acyl chloride 3 was reacted with diethyl malonate, then the formed diester was hydrolysed and decarboxylated in a one-pot reaction. The obtained 2-iodoacetophenone 4 was reacted with bromine and the dibromoacetophenone derivative 5 was hydrolysed to give the racemic 2-iodomandelic acid (±)-1. Optical resolution of (±)-1 via diastereomeric crystallization with strychnine afforded enantiopure (R)-(−)-1. Absolute configuration of (−)-1 and of its methyl ester (−)-6 was determined by VCD spectroscopy.
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