Yb. Liu et Gw. Gribble, Bis-Suzuki reactions of 2,3-dihaloindoles. A convenient synthesis of 2,3-diarylindoles, TETRAHEDR L, 41(45), 2000, pp. 8717-8721
A convenient, one-pot synthesis of 2,3-diarylindoles 4 is described via a b
is-Suzuki palladium-catalyzed cross coupling of 2,3-dihalo-1-(phenylsulfony
l)indoles 1 with arylboronic acids 2, followed by cleavage of the N-protect
ing group to give 4. The anti-inflammatory drug indoxole (4c) is prepared i
n high yield. (C) 2000 Elsevier Science Ltd. All rights reserved.