om5b00636_si_001.pdf (15.19 MB)
Download fileCatalyst Design of Vaska-Type Iridium Complexes for Highly Efficient Synthesis of π‑Conjugated Enamines
journal contribution
posted on 2015-10-26, 00:00 authored by Atsushi Tahara, Yasumitsu Miyamoto, Ryuta Aoto, Keisuke Shigeta, Yuta Une, Yusuke Sunada, Yukihiro Motoyama, Hideo NagashimaThe
appropriate design of a ligand (L) in IrCl(CO)(L)2 (4) realized the efficient synthesis of π-conjugated
enamines possessing hole-transport properties. The iridium complex
with electron-withdrawing phosphorus ligands catalyzed the hydrosilylation
of amides to the corresponding silylhemiaminals, which were transformed
to the enamines by heat or by treatment with acids. High catalytic
efficiency (TON > 10,000) was achieved, which made it possible
for the residual iridium in the enamine product to be below 20 ppb.