Highly efficient and enantioselective hydrogenation of quinolines and pyridines with Ir-Difluorphos catalyst
作者:Weijun Tang、Yawei Sun、Lijin Xu、Tianli Wang、Qinghua Fan、Kim-Hung Lam、Albert S. C. Chan
DOI:10.1039/c002668a
日期:——
resulted in a highly efficient catalyst system for asymmetrichydrogenation of quinolines at quite low catalyst loadings (0.05–0.002 mol%), affording the corresponding products with high enantioselectivities (up to 96%), excellent catalytic activities (TOF up to 3510 h−1) and productivities (TON up to 43000). The same catalyst was also successfully applied to the asymmetrichydrogenation of trisubstituted
Highly Enantioselective Hydrogenation of Quinoline and Pyridine Derivatives with Iridium-(P-Phos) Catalyst
作者:Wei-Jun Tang、Jing Tan、Li-Jin Xu、Kim-Hung Lam、Qing-Hua Fan、Albert S. C. Chan
DOI:10.1002/adsc.200900870
日期:——
3′‐bipyridine] and iodine (I2) for the asymmetrichydrogenation of 2,6‐substituted quinolines and trisubstituted pyridines [2‐substituted 7,8‐dihydroquinolin‐5(6H)‐one derivatives] is reported. The catalyst worked efficiently to hydrogenate a series of quinoline derivatives to provide chiral 1,2,3,4‐tetrahydroquinolines in high yields and up to 96% ee. The hydrogenation was carried out at high S/C (substrate
Iridium-catalyzed asymmetric hydrogenation of pyridine derivatives, 7,8-dihydro-quinolin-5(6H)-ones
作者:Xiao-Bing Wang、Wei Zeng、Yong-Gui Zhou
DOI:10.1016/j.tetlet.2008.05.138
日期:2008.8
[Ir(COD)Cl]2/MeO-Biphep/I2 catalyst system is highly effective for asymmetrichydrogenation of pyridine derivatives 7,8-dihydro-quinolin-5(6H)-ones with high enantioselectivities (up to 97% ee).
[Ir(COD)Cl] 2 / MeO-Biphep / I 2催化剂体系对不对称氢化吡啶衍生物7,8-二氢喹啉-5(6 H)-具有高对映选择性(至多97%ee)非常有效)。