Chemoselective Hydrogenation Reaction of Unsaturated Bonds in the Presence of an o-Nitrobenzenesulfonyl Group
摘要:
Chemoselective hydrogenation of unsaturated compounds bearing an o-nitrobenzenesulfonyl (Ns)-amide moiety, affording the corresponding saturated compounds, was accomplished efficiently without loss of the nitro group by using the Pd/MS3A catalyst and a H-2 balloon. Partial hydrogenation of alkynes bearing an Ns group to corresponding cis alkenes was achieved with the combination of the Pd/BN catalyst and an additive (diethylenetriamine or acetic acid).
Intramolecular Olefin Diamination for the Stereoselective Synthesis of 3-Aminopiperidines
作者:Simon Blakey、Aidi Kong
DOI:10.1055/s-0031-1290591
日期:2012.4
direct intramolecular diamination of terminal olefins is presented. The reaction, mediated by hypervalent iodine oxidants, produces substituted 3-aminopiperidine scaffolds with high regio- and stereoselectivity, rendering this process relevant to both medicinal chemistry and natural products synthesis. A general method for the direct intramolecular diamination of terminal olefins is presented. The reaction