2-Heptylidenesuccinic Acid (I, R= C&Ila).-3-Carbethoxy-3-decenoic acid, Stobbe half-ester (12 g, 0.05 mole), obtained by condensation of heptanal with diethyl succinate in the presence of potassum t-butoxide, E was hydrolyzed with 150 ml of 1 N aqueous alkaline solution at 8690'for 6-8 hr. The alkaline solution, after cooling to room temperature, was acidified with dilute sulfuric acid. The crude product was filtered and washed with 10 ml of ...
