
Polyhedron (2021)
Update date:2022-08-04
Topics:
Kathuria, Lakshay
Samuelson, Ashoka G.
Enantioselective reduction of imines to the corresponding chiral secondary amines has been studied using a series of chiral half-sandwich iridium complexes. Chiral N-heterocyclic carbene (NHC) ligands in these complexes were synthesized from readily available, naturally occurring amino acids. Inexpensive phenylsilane was used as a convenient hydrogen donor. Under the optimized conditions, Ir-NHC complexes could reduce ketimines in good yields, albeit with moderate enantiomeric excess (ee). The phenylglycine derived chiral NHC was shown to give the best Ir catalyst and it also gave the maximum ee compared to catalysts prepared from other NHCs in this series. The opposite enantiomer of the reduction product was always obtained while using the Ir complex bearing a valine based NHC. The yields were consistently high with a variety of imine substrates having different steric and electronic demands.
View MoreContact:(1) 206-3550089
Address:5115 NE 8TH PL, Renton, WA 98059 USA
Chengdu ZY Biochemical Technology Co., LTD
Contact:0086-28-88680086
Address:170 Qingpu Road, Shouan Town, Pujiang County
Contact:86-512-87182055
Address:No.128 Fangzhou Rd, Suzhou Industrial Park, China, 215125, China
Luoyang Aoda chemical Co.,Ltd.
Contact:+86-379-67518785 67516588
Address:MiaoWan industry district,YanShi City,Henan,China
Contact:+86-10-59484199
Address:No.58-A1026 Liangguan Street
Doi:10.1134/S1070428012110073
(2012)Doi:10.1021/jo302144w
(2013)Doi:10.1039/c2cc37481a
(2013)Doi:10.1039/c1dt10247h
(2011)Doi:10.1016/j.poly.2017.10.027
(2018)Doi:10.1016/S0040-4020(00)00621-9
(2000)