Abstract A new method for the direct conversion of carboxylic acids to aldehydes using N, N- dimethylchloromethyleniminium chloride and lithium tri-t-butoxyaluminum hydride was established. This method provides a convenient way for the chemoselective reduction of carboxylic acids even with such a functional group as halide, ester, nitrile, olefin, and ketone.
