Synthesis and structure of [Ru(PPh3)2(bipy)(MeCN)Cl][BPh4] and it's catalytic property towards regioselective and stereoselective allylation of phenols
The compound, [Ru(PPh3)2(bipy)(MeCN)Cl][BPh4] (1) has been synthesized from the precursor complex, [Ru(bipy)(PPh3)2Cl2]. The complex has been structurally characterized. This complex has been found to be an efficient catalyst for the regioselective allylation of phenols.
Here, we describe one simple Ir/hydrosilane catalytic system for chemoselective isomerization of 2-substituted allylic ethers. This facile strategy shows high efficiency towards a variety of substrates, including derivatives from bioactive molecules. The substituent at the α position of the olefins is supposed to be critical in retarding the alkene hydrosilylation process and leading the reaction to
Über die sogenannte anomale C<scp>LAISEN</scp>-Umlagerung. 2. Mitteilung
作者:A. Habich、R. Barner、W. von Philipsborn、H. Schmid
DOI:10.1002/hlca.19650480611
日期:——
The mechanism of the abnormal CLAISEN rearrangement, that is the isomerisation of o-allylphenols, has been investigated using deuterium as tracer. The incorporation and distribution of the label was followed by proton and deuterium NMR. analysis.
Although intramolecular hydroarylation is an attractive transformation of allylic aryl ethers, it has suffered from narrow substrate scope. We herein describe Ir/(S)-DTBM-SEGPHOS-catalyzed intramolecular hydroarylation of allylic aryl ethers. The reaction eliminates the structural requirement from the aryl group, affording 2,3-dihydrobenzofurans bearing a stereogenic carbon center at the C3 position
尽管分子内加氢芳基化是烯丙基芳基醚的一种有吸引力的转化,但它的底物范围狭窄。我们在此描述了 Ir/( S )-DTBM-SEGPHOS 催化的烯丙基芳基醚的分子内加氢芳基化。该反应消除了芳基的结构要求,提供了在 C3 位置带有立体碳中心的 2,3-二氢苯并呋喃,对映体过量高达 99%。