New monoterpene-derived phosphinopyridine ligands and their application in the enantioselective iridium-catalyzed hydrogenation
作者:Giorgio Chelucci、Mauro Marchetti、Andrei V. Malkov、Frédéric Friscourt、Martin E. Swarbrick、Pavel Kočovský
DOI:10.1016/j.tet.2011.05.075
日期:2011.7
derivatives with a phosphine or phosphinite pendant (1–11) have been synthesized from (+)-α-pinene, (−)-isopinocampheol, and/or (+)-camphor via Kröhnke annulation or another annulation method as the key step for the construction of the pyridine nucleus. The iridium complex of 6 proved to catalyze hydrogenation of the prochiral unfunctionalized alkene 44 with 94% ee, whereas the complex of 2 was most efficient
与膦或亚膦酸酯侧链(吡啶衍生物1 - 11)已经从(+)合成- α蒎烯,( - ) -异松蒎醇,和/或(+) -经由Kröhnke环或另一个环的方法的关键步骤樟脑用于构建吡啶核。铱的6络合物被证明可以催化94%ee的前手性未官能化烯烃44的氢化,而2的络合物在肉桂基酯45(ee的83%)的氢化中效率最高。