一种有效且普遍适用的协议,适用于palladacycle催化的芳基化 H-膦酸二异丙酯 在 水发展了。这种C–P键形成反应的显着特征包括宽范围的底物范围,包括不活泼的富电子和电子中性的芳基氯化物,弱的无机碱KF而不是诸如KO t Bu或NaO t Bu的强碱。C–Cl键,以及异丙醇 避免分解 H-膦酸二异丙酯。
Palladium-Catalyzed Phosphorylation of Aryl Mesylates and Tosylates
作者:Wai Chung Fu、Chau Ming So、Fuk Yee Kwong
DOI:10.1021/acs.orglett.5b03104
日期:2015.12.4
The first general palladium catalyst for the phosphorylation of arylmesylates and tosylates is reported. The newly developed system exhibits excellent functional group compatibility. For instance, free amino, keto, ester, and amido groups, as well as heterocycles, remain intact during the course of reaction. The mesylated derivatives of biologically active compounds such as 17β-estradiol and 6-hydroxyflavone
The palladium-catalyzed cross-coupling of dialkylphosphite with aromatic electrophiles (Hirao coupling) was re-investigated. Some limitations in terms of palladium loadings and substrate reactivity are alleviated with the use of Pd(OAc)(2) complexed to 1,1'-bis(diphenylphosphino) ferrocene (dppf) as a ligand. Various aryl and heteroaryl halides are employed to deliver both known and novel substituted phosphonates. The first examples of aryl chloride couplings are also reported. (C) 2008 Elsevier B.V. All rights reserved.
Aryltrimethylammonium Tetrafluoroborates in Nickel-Catalyzed C–P Bond-Forming Reactions