Stannylated allyl carbonates as versatile building blocks for the diversity oriented synthesis of allylic amines and amides
作者:Christian Bukovec、Uli Kazmaier
DOI:10.1039/c0ob00945h
日期:——
Stannylated allylic carbonates are suitable substrates for Pd-catalyzed allylic aminations. In DMF and with [allylPdCl]2 as catalyst the stannylated allyl amines formed can be directly coupled with electrophiles according to the Stille protocol, giving rise to highly functionalized buiding blocks in excellent yields.
Copper-Catalyzed Decarboxylative Functionalization of Conjugated β,γ-Unsaturated Carboxylic Acids
作者:Wei Zhang、Chengming Wang、Qiu Wang
DOI:10.1021/acscatal.0c03621
日期:2020.11.20
Copper-catalyzed decarboxylative coupling reactions of conjugated β,γ-unsaturated carboxylic acids have been achieved for allylic amination, alkylation, sulfonylation, and phosphinoylation. This approach was effective for a broad scope of amino, alkyl, sulfonyl, and phosphinoyl radical precursors as well as various conjugated β,γ-unsaturated carboxylic acids. These reactions also feature high regioselectivity
Enantioselective Claisen Rearrangements: Development of a First Generation Asymmetric Acyl-Claisen Reaction
作者:Tehshik P. Yoon、David W. C. MacMillan
DOI:10.1021/ja015612d
日期:2001.3.1
The development of an enantioselective catalytic Claisenrearrangement remains an important yet elusive goal in chemical synthesis. With this objective in mind, we recently reported the acyl-Claisen rearrangement, a Lewis acid-catalyzed variant of the Bellus reaction that utilizes acid chlorides and allylic amines in the stereoselective synthesis of ɑ,β-disubstituted-y,δ-unsaturated carbonyls (eq 1)
Cyclopalladated, phosphine free, 8-methyl quinoline based complexes (2a–j) are excellent catalysts for the Heck vinylation of aryl iodides and bromides with turnover numbers of greater than 25 million observed in some cases. The catalysts are air and moisture stable.
Pyrazole and benzothiazole palladacycles: stable and efficient catalysts for carbon–carbon bond formation
作者:Xinjie Gai、Ronald Grigg、M. Imran Ramzan、Visuvanathar Sridharan、Simon Collard、Jayne E. Muir
DOI:10.1039/b005452f
日期:——
Cyclopalladated phosphine free pyrazole complexes 1 and benzothiazole complexes 2 are excellent catalysts for the Heck vinylation of aryl iodides and termolecular queuing cascades, leading to turnover numbers of >106 in some cases, at moderate temperatures; these catalysts show high thermal stability and are not sensitive to moisture and air.