Synthese, Koordinationschemie und Ligandeneigenschaften sekundärer Phosphane R(Ar*)PH mit sperrigen aromatischen Resten - Molekülstruktur von Ph(2,4,6-iPr3C6H2)PH, (2,4,6-iPr3C6H2)2PH und ClAu[PhP(2,4,6-Bu3C6H2)H] / Synthesis, Coordination Chemistry and Ligand Properties of Secondary Phosphines R(Ar*)PH with Bulky Aromatic Substituents - Molecular Structure of Ph(2,4,6-iPr3C6H2)PH, (2,4,6-iPr3C6H2)2PH and ClAu[PhP(2,4,6-tBu3C6H2)H]
摘要:
次磷膦R(Ar*)PH(R = Me, iPr, Ph, Mes, Ar*)(2a-2h),其中Ar*为大体积芳香基团(Ar* = 2,3,6-R′3C6H2,R′ = iPr,tBu),通过RPCl2、PCl3、PBr3或Ar*P(Cl,Br)2与2,4,6-tBu3C6H2Li或2,4,6-iPr3C6H2MgBr的反应,并通过还原中间卤代磷膦R(Ar*)PX(X = Cl,Br)与LiAlH4得到高产率。苯基(2,4,6-iPr3C6H2)PH(2g)的X射线结构分析,空间群P1,显示P-C距离为1.824(1)和1.838(1)Å。2a-2c的锂衍生物在溶液中是单体的,如低温下1:1:1:1四重态7Li-31P精细结构的31P {1H} NMR信号所示。2a-2c和2f-2h形成Ni(0)和Fe(0)配合物(CO)3NiL(6a-6f)和Fe(CO)4L(7a-7d),差不多具有相同的Tolman电子参数。在系列2a-2h中,利用先进的分子建模技术估计了P原子的空间屏蔽效应。大体积配体2c形成了铜配合物[Cu(CH3CN)2(2c)2][PF6](8)、Cu2Cl2(2c)2(9)和Cl-Au(2c)(10)。虽然10在溶液中是单体的,但在固态中形成了头对尾定向单体的成对结构,具有几乎线性的Cl - Au - P骨架(Cl - Au - P 175.47(9)°),如X射线结构分析所示。
Synthesis and Structure of Intermediates in Copper-Catalyzed Alkylation of Diphenylphosphine
作者:Matthew F. Cain、Russell P. Hughes、David S. Glueck、James A. Golen、Curtis E. Moore、Arnold L. Rheingold
DOI:10.1021/ic100816u
日期:2010.9.6
or 17 with PHPh2 to yield equilibrium mixtures containing 12 and the tertiaryphosphines 4 or 7; equilibrium constants for these reactions were 8(2) and 7(2), favoring complexation of the smaller secondary phosphine in both cases. These observations are consistent with a proposed mechanism for catalytic P−C bond formation involving deprotonation of the cationic diphenylphosphine complex [Cu(triphos)(PHPh2)][PF6]
Palladium-Catalyzed Asymmetric Phosphination. Scope, Mechanism, and Origin of Enantioselectivity
作者:Natalia F. Blank、Jillian R. Moncarz、Tim J. Brunker、Corina Scriban、Brian J. Anderson、Omar Amir、David S. Glueck、Lev N. Zakharov、James A. Golen、Christopher D. Incarvito、Arnold L. Rheingold
DOI:10.1021/ja070225a
日期:2007.5.1
initiated by oxidative addition to Pd(0) yielding Pd((R,R)-Me-Duphos)(Ph)(I) (3). Reversible displacement of iodide by PHMe(Is) gave the cation [Pd((R,R)-Me-Duphos)(Ph)(PHMe(Is))][I] (4), which was isolated as the triflate salt and crystallographically characterized. Deprotonation of 4-OTf with NaOSiMe3 gave the phosphido complex Pd((R,R)-Me-Duphos)(Ph)(PMeIs) (5); an equilibrium between its diastereomers
作者:Oliver Herd、Antonella Heßler、Klaus P. Langhans、Othmar Stelzer、William S. Sheldrick、Norbert Weferling
DOI:10.1016/0022-328x(94)84012-1
日期:1994.7
soluble tertiary phosphanes 2, 7, 10–17 with sulfonated aromatic substituents p- C6H4-SO3K and 2,4-C6H3(SO3K)2 can be obtained in good yields by nucleophilic aromatic substitution of fluorine in p-F-C6H4-SO3K (1) or F-C6H3-2,4-(SO3K)2 (5) with PH3 or primary and secondary phosphanes in the superbasic medium dimethyl sulfoxide (DMSO)/KOH(solid). The first water-soluble secondary phosphane HP[C6H3-2,4-(SO3K)2]2
水溶性叔膦2,7,10-17与磺化芳族取代基p - Visual C 6 H ^ 4 -SO 3 K和2,4--C 6 H ^ 3(SO 3 K)2可以以良好的收率由亲核芳族取代来获得氟在p -FC 6 ħ 4 -SO 3 K(1)或FC 6 H ^ 3 -2,4-(SO 3 K)2(5)与PH 3或超碱性介质二甲基亚砜(DMSO)/ KOH(固体)中的伯或仲膦。如果5在相似条件下与PH 3反应,则可获得具有磺化芳族取代基的第一水溶性仲膦HP [C 6 H 3 -2,4-(SO 3 K)2 ] 2(6)。6与FC 6 H 5,n BuBr或C 6 H 5 -CH 2反应生成高磺化的膦烷(7-9),在水中具有显着的溶解性。-Br分别在超碱性介质中。所得化合物已通过1 H,13 C(1 H和31 P(1 H)NMR光谱进行了鉴定。P(p -C 6 H 4 -SO 3 K)3 ·KCl·0.5的X射线结构分析H
Platinum-Catalyzed Asymmetric Alkylation of Bis(isitylphosphino)ethane: Stereoselectivity Reversal in Successive Formation of Two P−C Bonds
作者:Timothy W. Chapp、David S. Glueck、James A. Golen、Curtis E. Moore、Arnold L. Rheingold
DOI:10.1021/om900800z
日期:2010.1.25
(s-BuLi) and alkylation with 2-(chloromethyl)naphthalene. Analysis of the observed diastereo- and enantioselectivity in the Pt-catalyzed alkylations of 1 and 3 yielded quantitative information on the stereoselectivity of both P−C bond-forming steps. The firstalkylation (1 → 3) resulted in diastereoselective formation of a tertiary phosphine stereocenter (∼2:1 ratio). In the second alkylation (3 → 2),
双烷基化(二次)膦IsHP(CH 2)2个潜在危险装置(1 ; IS = isityl = -2,4,6-(我-Pr)3 c ^ 6 ħ 2)与2-(溴甲基)萘,使用10摩尔%的催化剂前体Pt((R,R)-Me-DuPhos)(Ph)(Cl)和碱式NaOSiMe 3选择性地产生内消旋-IsP(CH 2 Ar)(CH 2)2 P(CH 2 Ar)(Is )(2; Ar = 2-萘基; dr =内消旋/ rac比= 3.4∶1)。半烷基化的IsP(CH 2 Ar)(CH2)2 PH(IS)(3),在该反应中的中间体,制备自1通过去质子化(小号正丁基锂)和烷基化2-(氯甲基)萘。对在Pt催化的1和3的烷基化反应中观察到的非对映选择性和对映选择性进行分析,得到了有关两个P-C键形成步骤的立体选择性的定量信息。第一次烷基化(1 → 3)导致叔膦立体中心(〜2:1的比例)的非对映选择性形成。但是,在第二个烷基化反应(3
Method for enantioselective synthesis of phosphorus-stereogenic phosphines
申请人:Trustees of Dartmouth College
公开号:US08193392B2
公开(公告)日:2012-06-05
The present invention relates to a process for preparing an enantioenriched phosphorus-stereogenic, tertiary phosphine. Secondary phosphines are contacted with an alkyl halide and base in the presence of a chiral metal catalyst thereby producing the enantioenriched phosphorus-stereogenic, tertiary phosphine for subsequent use in homogeneous catalysis reactions.