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。
Palladacycle-catalyzed phosphonation of aryl halides in neat water
作者:Kai Xu、Fan Yang、Guodong Zhang、Yangjie Wu
DOI:10.1039/c3gc00030c
日期:——
of diisopropyl H-phosphonate in water was developed. The remarkable features of this C–P bond-forming reaction include wide substrate scope including the inactive electron-rich and electron-neutral aryl chlorides, the weak inorganic base KF instead of strong bases such as KOtBu or NaOtBu for the activation of C–Cl bond, and the addition of isopropanol to avoid the decomposition of diisopropyl H-phosphonate
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。
Revisiting the Hirao cross-coupling: improved synthesis of aryl and heteroaryl phosphonates
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.
Stereoselective Synthesis of Phosphoryl-Substituted Phenols
作者:Biquan Xiong、Mei Li、Yanxi Liu、Yongbo Zhou、Changqiu Zhao、Midori Goto、Shuang-Feng Yin、Li-Biao Han
DOI:10.1002/adsc.201300913
日期:2014.3.10
been achieved using P(O)H compounds as efficient phosphorylation reagents without the assistance of any ligand. Optically active H‐phosphinates can also act as good substrates in the reaction, giving the (Sp)‐phosphoryl substituted phenolic compounds stereospecifically with retention of configuration at the phosphorus center. Furthermore, it is shown that the migration of phosphorus on O‐aryl phosphonates