The functionalization of differently substituted hydropentalenone derivatives 9, derivedfrom the Weiss diketone (8) by enantioselective deprotonation in the presence of lithium (R,R)-bis(1-phenylethyl)amide/LiCl (11·LiCl) as the chiral base is described. In the first route the resulting enolate was treated directly with alkyl halides as electrophiles to give the target α-alkylhydropentalenones 12