... Tetrahedron Letters. Volume 54, Issue 11, 13 March 2013, Pages 1424–1427. ... In a recent Letter, Joydev and others have described the synthesis of substituted R-carbolines involving a palladium coupling reaction with Pd(OAc) 2 , PCy 3 ·HBF 4 , DBU, DMA between aniline and 2 ...