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2004
Carboxylic acid esters
Q 0530
Synthesis of Arylacetic Acid Derivatives from Diethyl Malonate Using in situ
Palladium(1,3-dialkylimidazolidin-2-ylidene) Catalysts. — Imidazolium
45- 095 Formed
salts (I) and (II) serve as precursors of NHC(N-heterocyclic carbene) ligands. They are
applied to the Pd-catalyzed cross-coupling reaction of aryl halides with diethyl malonate. Arylacetic esters are formed with concomitant dealkoxycarboxylation. The yields
are similar for all imidazolinium halides. The best result is obtained with (IIa) except
in the case of substrate (XI). — (OEZDEMIR, I.; YIGIT, M.; CETINKAYA, E.;
CETINKAYA*, B.; Tetrahedron Lett. 45 (2004) 30, 5823-5825; Dep. Chem., Univ.
Ege, TR-35100 Bornova, Turk.; Eng.) — Mais
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