A highly stereoselective catalytic alkylation sequence for the synthesis of highly functionalized and versatile five-membered-ring compounds bearing all-carbon quaternary stereocenters was developed. Enantioselective desymmetrization of achiral cyclopentene-1,3-diones was thus executed by chiral Cu-phosphoramidite catalysts. A variety of complicated cyclopentane derivatives can be synthesized with
Auto-Tandem Catalysis: Pd<sup>II</sup>
-Catalysed Dehydrogenation/Oxidative Heck Reaction of Cyclopentane-1,3-diones
作者:Claire J. C. Lamb、Bryan G. Nderitu、Gemma McMurdo、John M. Tobin、Filipe Vilela、Ai-Lan Lee
DOI:10.1002/chem.201704442
日期:2017.12.22
3-diones and the subsequent oxidative Heck coupling. This auto-tandem catalytic reaction is applicable to both batch and continuousflow processes, with the latter being the first example of a tandem aerobic dehydrogenation/oxidative Heck in flow. In addition, a telescoped reaction involving enantioselective desymmetrisation of the all-C quaternary centre was successfully achieved.