Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Chlorides of a variety of acids: primary, secondary, tertiary, long chain aliphatic and αβ-unsaturated have been converted into aldehydes by reduction with formic acid at pH 9–10 at room temperature in high yields. ... Acid chlorides on reduction with formic acid yield aldehydes.