In step one, acetoacetic ester is deprotonated and may then function a nucleophile and assault the alkyl halide. Immediately after this, the ester is then hydrolyzed to the carboxylic acid which then loses carbon dioxide by way of a nicely organized six-membered transaction state: Shake refers to the compact pieces https://trevorjrxwp.blogsmine.com/33340140/not-known-details-about-decarboxylation