Perchlorobutyryl chloride

Perchlorobutyryl chloride Introduction of aldehyde groups into ar. rings... 

Dimethylaniline added with ice-cooling to perchlorobutyryl chloride in dry di-methylformamide and warmed 2 hrs. at 40° -> p-dimethylaminobenzal chloride (Y 89%) warmed gently in water with addition of dil. NaOH until the mixture is alkaline p-dimethylaminobenzaldehyde (Y 83%). A. Roedig and W. Wenzel, Ang. Ch. 81, 36 (1969). 

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