AbstractA one‐pot, two‐step catalytic protocol for the preparation of cinnamyl ethers from simple and readily available aryl halides, phenols and allyl chloride is reported for the first time. This simple and highly efficient palladium nanoparticles catalytic system shows good regio‐ and stereoselectivities and affords the desired products in good to high yields (49–85%) from aryl iodides. Furthermore, less reactive aryl bromides can also give the cinnamyl ethers in moderate yields (24–72%).magnified image
Pd-Catalyzed Olefination of Furans and Thiophenes with Allyl Esters
作者:Yuexia Zhang、Zejiang Li、Zhong-Quan Liu
DOI:10.1021/ol203013p
日期:2012.1.6
A direct Pd(II)-catalyzed olefination of furans and thiophenes with allyl esters is demonstrated. Under the typical conditions, the dehydrogenative Heck coupling reactions of heteroarenes with allylic esters proceeded via a β-H elimination rather than a β-OAc elimination to give the corresponding γ-substituted allylic esters.