STUDIES ON THE PALLADIUM-CATALYZED COUPLING OF ACID-CHLORIDES AND AROMATIC HALIDES WITH TRIBUTYLHETEROCYCLICTIN REAGENTS

In the coupling reaction of 2-furyltributylstannane (6a), 2-thienyl tr ibutylstannane (6b), and 2-(N-methyl) pyrrolyltributylstannane (6c) wi th 2, 2, 3, 3-tetramethylcyclopropane carbonyl chloride (5), cinnamyl chloride (7), 1-bromo-4-nitrobenzene 3), and 2-chloro-3, 5-dinitropyri dine (4) usual coupling products were obtained respectively in high yi elds except the reaction of 6c and 5 which gave 2, 5-bis(2, 2, 3, 3-te tramethylcyclopropane carbonyl)-N-methyl pyrrole (2). The coupling rea ction of aromatic halides and heteroarylhalides with 6a, 6b and 6c too k place in good yields under mild condition. Sixes novel compounds: 2, 8,9,15, 16 and 17 were obtained individually.