Transition metal enolate chemistry. Formation of a palladium alkyl complex from a highly reactive enolato palladium complex

Abstract

The ester-derived palladium enolate [LPd{Ph₂PCHC(O)OEt}]1(L =o-C₆H₄CH₂NMe₂) reacts instantly with dimethyl acetylenedicarboxylate and tetracyanoethylene in tetrahydrofuran (THF) to yield respecitively the alkenyl complex [LPd{Ph₂PCH[C(O)OEt](MeO₂CCCCO₂Me)}]2 and the alkyl complex [LPd{Ph₂PCH[C(O)OEt][(NC)₂CC(CN₂)]}]3.