The highly linear-selective hydroaminomethylation of styrenes is very challenging. Herein, an efficient, highly chemoselective, and linear-selective hydroaminomethylation (l/b up to >99:1) of styrenes using Rh(nbd)2SbF6 with a pyrrole-based 3,3′,5,5′-substituted tetraphosphorus ligand is documented. This is in sharp contrast to other available processes leading to branched amines and provides a novel
That's just silyl! Selective nickel‐catalyzed reductiveamination of aldehydes under hydrosilylation conditions is achieved by using a one pot, two step procedure. By using an in situ‐generated catalyst (5 mol %) from Ni(OAc)2 and tricyclohexylphosphine with tetramethyldisiloxane (TMDS) as the hydrosilane at 70 °C, the corresponding secondary amines were obtained in moderate to good isolated yields
Borrowing Hydrogen in Water and Ionic Liquids: Iridium-Catalyzed Alkylation of Amines with Alcohols
作者:Ourida Saidi、A. John Blacker、Gareth W. Lamb、Stephen P. Marsden、James E. Taylor、Jonathan M. J. Williams
DOI:10.1021/op100024j
日期:2010.7.16
The use of [Cp*IrI2]2 as an efficient catalyst for the alkylation of amines by alcohols in either water or ionic liquid is described. Primary amines are converted into secondaryamines, and secondaryamines into tertiaryamines in the absence of base, and the chemistry has been applied to the synthesis of the analgesic fentanyl. The conversion of primary amines into N-heterocycles by the reaction with
描述了使用[Cp * IrI 2 ] 2作为在水或离子液体中通过醇使胺烷基化的有效催化剂。在不存在碱的情况下,伯胺被转化为仲胺,仲胺被转化为叔胺,并且该化学方法已经应用于止痛药芬太尼的合成。还描述了通过与二醇反应将伯胺转化为N-杂环以及磺酰胺的N-烷基化。
v. Braun, Chemische Berichte, 1910, vol. 43, p. 3216