Suzuki–Miyaura Reactions of Halospirooxindole Derivatives

Starting from 5,5′‐dihalo‐1′‐pentyl‐2 H ‐spiro[furo[2,3‐ b ]pyridine‐3,3′‐indolin]‐2′‐one, various 5,5′‐di(het)aryl‐1′‐pentyl‐2 H ‐spiro[furo[2,3‐ b ]pyridine‐3,3′‐indolin]‐2′‐ones were synthesized through palladium‐catalysed cross‐coupling reactions. A large panel of boronic acids (aryl or heteroaryl) could easily be introduced, leading to a library of new 5‐ or 5′‐monosubstituted and 5,5′‐disubstituted 1′‐pentyl‐2 H ‐spiro[furo[2,3‐ b ]pyridine‐3,3′‐indolin]‐2′‐ones.