1,<i>n</i>-Rearrangement of Allylic Alcohols Promoted by Hot Water: Application to the Synthesis of Navenone B, a Polyene Natural Product
作者:Pei-Fang Li、Heng-Lu Wang、Jin Qu
DOI:10.1021/jo5004086
日期:2014.5.2
n-rearrangement (n = 3, 5, 7, 9) of allylic alcohols. In some cases, the rearrangement reactions joined isolated C–C double or triple bonds to generate conjugated polyene or enyne structure motifs. We used the 1,3-rearrangement reaction of an allylic alcohol in hot water as part of an attractive new strategy for construction of the polyene naturalproduct navenone B by iterative use of a Grignard reaction
Functional Metathesis Catalyst Through Ring Closing Enyne Metathesis: One Pot Protocol for Living Heterotelechelic Polymers
作者:Subhajit Pal、Fiorella Lucarini、Albert Ruggi、Andreas F. M. Kilbinger
DOI:10.1021/jacs.7b12805
日期:2018.3.7
Enyne ring closing metathesis has been used to synthesize functional group carrying metathesiscatalysts from a commercial (Ru-benzylidene) Grubbs' catalysts. The new Grubbs-type ruthenium carbene was used to synthesize living heterotelechelic ROMP polymers without any intermediate purification. Olefinmetathesis with a mono substituted alkyne followed by ring closing metathesis with an allylic ether
[2+2] Cycloadditions by Oxidative Visible Light Photocatalysis
作者:Michael A. Ischay、Zhan Lu、Tehshik P. Yoon
DOI:10.1021/ja103934y
日期:2010.6.30
cyclobutanes and other strained ring systems that are difficult to construct using other conventional synthetic methods. We have previously shown that Ru(bpy)(3)(2+) is an efficient photocatalyst that promotes the [2+2] cycloadditions of electron-deficient olefins with visible light. Here, we show that Ru(bpy)(3)(2+) is also an effective photocatalyst for the [2+2] cycloaddition of electron-rich olefins
Heterotelechelic Polymers by Ring-Opening Metathesis and Regioselective Chain Transfer
作者:Peng Liu、Mohammad Yasir、Albert Ruggi、Andreas F. M. Kilbinger
DOI:10.1002/anie.201708733
日期:2018.1.22
Heterotelechelic polymers were synthesized by a kinetic telechelic ring‐opening metathesis polymerization method relying on the regioselective cross‐metathesis of the propagating Grubbs’ first‐generation catalyst with cinnamyl alcohol derivatives. This procedure allowed the synthesis of hetero‐bis‐end‐functional polymers in a one‐pot setup. The molecular weight of the polymers could be controlled by