The well-known Pinner reaction converts nitriles into esters. The classic process uses extreme conditions, long reaction times, and concentrated acids. These conditions are not optimal for the synthesis of certain products as well as not environmentally friendly. The Pinner reaction was revisited using chlorotrimethysilane as the source of acid. A variety of aromatic and aliphatic nitriles were converted to methyl and ethyl esters in moderate to good yields.

Pinner reaction revisited

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