Palladium-catalyzed intermolecular alkylation of enamides with [small alpha]-bromo carbonyls was developed. Under mild reaction conditions, various cyclic and acyclic enamides reacted well with [small alpha]-bromo carbonyls to afford the corresponding multi-substituted alkene...
ethynylation reaction between N‐vinylacetamides and (bromoethynyl)triisopropylsilane catalyzed by palladium is reported. A broad scope of cyclic N‐vinylacetamide derivatives was tolerated and the corresponding products could be obtained in acceptable yields. This work provides a general tool for the synthesis of conjugated enyne products using palladium(II) acetate as catalyst. The mild reaction conditions
A highly regioselectivereaction of 2-indolylmethanols with enamides has been developed at room temperature by using AlCl3 as a catalyst. A wide range of hybrids (40 examples) of indoles and enamides were obtained in moderate to good yields (up to 98% yield). This transformation represents the efficient way to introduce biologically important indoles and enamides skeleton into structurally complex
Palladium-catalyzed alkenyl C–H bond sulfonylation reaction using organosulfonyl chlorides
作者:Yun-He Xu、Min Wang、Ping Lu、Teck-Peng Loh
DOI:10.1016/j.tet.2013.01.071
日期:2013.6
A Pd-catalyzed alkenyl C-H bond direct sulfonylation of vinyl pyridine and enamides was developed. Various arylsulfonyl chlorides were tested in this reaction and the desired products were obtained in good yields. Moreover, the alkyl sulfonyl chloride could also be used though the yield was lower. A possible Pd(II)/Pd(IV) catalytic pathway involved in this coupling reaction was proposed. (C) 2013 Elsevier Ltd. All rights reserved.