One-pot conversion of terminal alkynes into gem-disubstituted-alkenes
摘要:
A one-pot reaction of terminal alkynes with in situ generated hydrogen iodide and organozinc compounds in the presence of Pd(PPh3)4 provided a simple and useful method for the preparation of gem-disubstituted-alkenes.
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.