Hemilabile P-Alkene Ligands in Chiral Rhodium and Copper Complexes: Catalytic Asymmetric 1,4 Additions to Enones. 2<sup>,</sup>
作者:Emma Drinkel、Alexander Briceño、Reto Dorta、Romano Dorta
DOI:10.1021/om100248u
日期:2010.6.14
bidentate P-alkene ligands was observed in the presence of Lewis basic solvents, and model compounds of mono- and bis-solvated species (13, 14) were isolated. Cu formed trigonal-planar neutral (15−17) and cationic complexes (18, 19) of the general formulas [CuI(κ1P-alkene)2] and [Cu(κ1P-alkene)2BF4], respectively (P-alkene = 2, 4, 5). The cationic Rh species 11 catalyzed the 1,4-addition of arylboronic
两个当量手性二苯并[的b,˚F ]氮杂衍生的P-烯烃配体2 - 6每金属,得到单核的Rh(I)和Cu(I)作为催化剂的不对称共轭加成反应,其配合物。的Rh形成正方形平面中性(8 - 10)和阳离子络合物(11,12)通式[的RhCl(κ 1 P-烯烃)(κ 2 P-烯烃)]以及顺式- [铑(κ 2 P-烯)2 ] [BF 4分别],(P-烯烃= 2,5,6)。在这两种情况下在路易斯碱性溶剂的存在下,观察到双齿P-烯烃配体的烯烃功能的可逆decoordination,和单-和双-溶剂化物种(的模型化合物13,14分离)。Cu而形成三角平面的中性(15 - 17)和阳离子络合物(18,19通式[的CuI(κ)的1 P-烯烃)2 ]和[Cu(上κ 1 P-烯烃)2 BF 4 ],分别(P-烯烃= 2,4,5)。阳离子Rh物种11催化芳基硼酸向高活性(40°C下的TON = 62)和出色的对映体控