N,N,-dimethyl(chlorosulphenyl)methaniminium chloride mediated direct and chemoselective conversion of carboxylic acids to aldehydes

A new method for the direct conversion of carboxylic acids to aldehydes using N,N-dimethyl(chlorosulphenyl)methaniminium chloride and lithium triethyl-borohydride (super-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