carbon–heteroatom bonds. However, its potential application in the formation of carbon and phosphorus remains unexplored. In this study, we present an alkoxide base-promoted reaction system that enables deborylative phosphination of benzylic organoboronates and geminal bis(boronates) via selective C–B bondcleavage. This approach allows for the synthesis of valuable tertiary phosphines in good yields under
chromatography workup of the crude R′P(OR)2 intermediates, we have developed an extremely simple and general synthetic route to H-phosphinates from commercially available Grignard reagents and P(OR)3. An alternative approach involved the use of ClP(OR)2 in place of P(OR)3, which proved to be a valuable strategy for the preparation of sterically hindered ArMgBr substrates bearing bulky ortho-substituted
H-磷酸盐代表一类有价值的有机磷结构单元和催化配体。现有的合成方法通常与强酸的使用、中间体精细处理的需要以及仅引入对芳基的限制有关。在对粗 R'P(OR) 2中间体的色谱处理过程中观察到的意外 SiO 2促进的水解进行全面研究后,我们开发了一种极其简单且通用的合成路线,从市售格氏试剂和 P (或) 3 .另一种方法涉及使用 ClP(OR) 2代替 P(OR) 3 ,这被证明是制备带有大体积邻位取代基序的空间位阻 ArMgBr 底物的有价值的策略。因此,使用该实用方案以中等至高产率获得了 36 种结构不同的 P-(环)烷基和 P-(杂)芳基H-次膦酸盐库。此外,还检查了CuCl 2介导的P(O)–H键衍生,导致以接近定量的产率形成相应的EtOPhP(O)–X (X = O, N, S)化合物。
作者:Rohan J. Kumar、Mary Chebib、David E. Hibbs、Hye-Lim Kim、Graham A. R. Johnston、Noeris K. Salam、Jane R. Hanrahan
DOI:10.1021/jm7015842
日期:2008.7
gamma-Aminobutyric acid (GABA) analogues based on 4-amino-cyclopent-1-enyl phosphinic acid (34-42) and 3-aminocyclobutane phosphinic acids (51, 52, 56, 57) were investigated in order to obtain selective homomeric rho(1) GABA(C) receptor antagonists. The effect of the stereochemistry and phosphinic acid substituent of these compounds on potency and selectivity within the GABA receptor subtypes was investigated. Compounds of high potency at GABA(C) rho(1) receptors (36, K-B = 0.78 mu M) and selectivity greater than 100 times (41, K-B = 4.97 mu M) were obtained. The data obtained was analyzed along with the known set of GABA(C) rho(1) receptor-ligands, leading to the development of a pharmacophore model for this receptor, which can be used for in silico screening.
Convenient One Pot Synthesis of Phosphonites and H-Phosphinates
作者:Imre Petneházy、Zsuzsa M. Jászay、Andrea Szabó、Kinga Everaert
DOI:10.1081/scc-120018928
日期:2003.1.6
A convenient and simple one-pot method is described for the synthesis of phosphonites [RP(OEt)(2), 1] and H-phosphinates [HP(O)R(OEt), 2] from triethyl phosphite and appropriate Grignard reagents.
ISSLEIB K.; MOGELIN W., SUNTH. AND REACT. INORG. AND METAL-ORG. CHEM., 16,(1986) N 5, 645-662