The palladium-catalyzed desilylation-arylation of substituted vinylsilanes by p-iodoanisole in the presence of bidentate phosphine ligands is described. Apart from enhancing the rate of the reaction considerably, heteroatom-based functional groups in the vinylsilane moiety have a profound influence on the regiochemistry. A catalytic cycle for the chelation-controlled desilylation-arylation reaction
Combining Copper-Catalyzed Hydroboration with Palladium-Catalyzed Suzuki Coupling for the One-pot Synthesis of Arylallylamines under Micellar Conditions
作者:Pedro A. Horn、Roger K. Braun、Victória G. Isoppo、Jessie S. da Costa、Diogo S. Lüdtke、Angélica V. Moro
DOI:10.1002/adsc.201700094
日期:2017.7.3
we report the one‐pot dual‐metal catalytic synthesis of arylallylamines, by combination of a Cu‐catalyzed hydroboration with a Pd‐catalyzed Suzuki arylation, using a broad range of aryl halides. Importantly, the reaction sequence was entirely performed in water, in the presence of small amounts of SPGS‐550M, without the need of solvent switch or addition of organic co‐solvents, rendering it operationally
Substrate-Directable Heck Reactions with Arenediazonium Salts. The Regio- and Stereoselective Arylation of Allylamine Derivatives and Applications in the Synthesis of Naftifine and Abamines
The palladium-catalyzed, substrate-directable Heck-Matsuda reaction of allylamine derivatives with arenediazonium salts is reported. The reaction proceeds under mild conditions, with excellent regio- and stereochemical control as a function of coordinating groups present in the allylamine substrate. The distance between the olefin moiety and the carbonylic system seems to play a key role regarding the regiocontrol. The method presents itself as robust, as simple to carry out, and with wide synthetic scope concerning the allylic substrates and the type of arenediazonium employed. The synthetic potential of the method is illustrated by the short total syntheses of the bioactive compounds naftifine, abamine, and abamine SG.