Synthesis of Hemilabile P,N Ligands: ω-2-Pyridyl-n-alkylphosphines
摘要:
A series of P,N ligands of the general formula (2-py)-(CH2)(n)-PR2 (2-py: 2-pyridyl; R: i-Pr (n = 1, 4-7), Ph (n = 5-7)) 4a-g and 6a has been synthesized. Starting from 2-picoline (1), 2-(omega-chloroalkyl)pyridines 3a-d are prepared. The reactions of 3a-d with (i-Pr)(2)PLi and Ph2PLi, respectively, result in the title compounds 4a-g in up to 89% yield. Reaction of Cl-(CH2)(3)-P(i-Pr)(2) with 2-picolyllithium (2) is an alternative route to 4a. Additionally, P,P,N ligands 7a and 9 are synthesized by similar methods. All new compounds were fully characterized. The formation of cyclic pyridinium derivatives 5a and 5b from intramolecular SN reactions of 3a and 3b is discussed in detail.
Synthesis of Hemilabile P,N Ligands: ω-2-Pyridyl-n-alkylphosphines
作者:Achim Jansen、Stephan Pitter
DOI:10.1007/pl00010260
日期:1999.6
A series of P,N ligands of the general formula (2-py)-(CH2)(n)-PR2 (2-py: 2-pyridyl; R: i-Pr (n = 1, 4-7), Ph (n = 5-7)) 4a-g and 6a has been synthesized. Starting from 2-picoline (1), 2-(omega-chloroalkyl)pyridines 3a-d are prepared. The reactions of 3a-d with (i-Pr)(2)PLi and Ph2PLi, respectively, result in the title compounds 4a-g in up to 89% yield. Reaction of Cl-(CH2)(3)-P(i-Pr)(2) with 2-picolyllithium (2) is an alternative route to 4a. Additionally, P,P,N ligands 7a and 9 are synthesized by similar methods. All new compounds were fully characterized. The formation of cyclic pyridinium derivatives 5a and 5b from intramolecular SN reactions of 3a and 3b is discussed in detail.
Synthesis and structural studies of dimolybdenum(V), palladium(II) and dicopper(I) complexes that contain mixed pyridyl-iso-propylphosphine ligands
作者:Hui-Fang Lang、Phillip E Fanwick、Richard A Walton
DOI:10.1016/s0020-1693(01)00721-6
日期:2002.1
Mo2(μ-O2CCH3)4 with 2-pyridyl(diisopropylphosphino)methane (NP) affords the dimolybdenum(V) complex Mo2(μ-O)2O2Cl2(η2-NP)2 (1). Complexes of the related 2-pyridylbis(diisopropylphosphino)methane ligand (NP2) have been isolated, namely, a mixed bromo/chloro complex of composition PdBr1.09Cl0.91(η2-NP2) (2) and the dicopper(I) complex [Cu2(μ-η3-NP2)2](BF4)2 (3). The structures of 1, 2 and 3 have been established
摘要Mo2(μ-O2CCH3)4与2-吡啶基(二异丙基膦基)甲烷(NP)的反应提供了二钼(V)络合物Mo2(μ-O)2O2Cl2(η2-NP)2(1)。已分离出相关的2-吡啶基双(二异丙基膦基)甲烷配体(NP2)的配合物,即组成为PdBr1.09Cl0.91(η2-NP2)(2)和双铜(I)配合物的溴/氯混合配合物[ Cu 2(μ-η3 -NP 2)2](BF 4)2(3)。通过X射线晶体学已经确定了1、2和3的结构。