61360-99-4Relevant articles and documents
Stereoselective and Atom-Economic Alkenyl C-H Allylation/Alkenylation in Aqueous Media by Iridium Catalysis
Ding, Liyuan,Huang, Yinhua,Lu, Xiunan,Shen, Wenzhou,Xu, Liangyao,Yu, Feifei,Zhang, Jian,Zhong, Guofu,Zhong, Liangjun
, p. 7225 - 7237 (2020/07/07)
A practical and atom-economic protocol for the stereoselective preparation of various 1,4-and 1,3-diene skeletons through iridium-catalyzed directed olefinic C-H allylation and alkenylation of NH-Ts acrylamides in water was developed. This reaction tolerated a wide scope of substrates under simple reaction conditions and enabled successful gram-scale preparation. Furthermore, an asymmetric variant of this reaction giving enantioenriched 1,4-dienes was achieved employing a chiral diene-iridium complex as the catalyst.
Rhodium-Catalyzed Defluorinative Vinylation of gem-Difluoroalkenes for the Synthesis of 2-Fluoro-1,3-dienes
Song, Shengjin,Liu, Huan,Wang, Lu,Zhu, Chuan,Loh, Teck-Peng,Feng, Chao
supporting information, p. 1036 - 1040 (2019/09/16)
Herein, we present a strategy for the formation of 2-fluoro-1,3-diene derivatives via rhodium-catalyzed direct C(sp2)—C(sp2) cross-coupling of gem-difluoroalkenes and acrylamides. By merging Rh(III)-catalyzed C(sp2)–H bond activation and nucleophilic addition/F-elimination of gem-difluoroalkene, an efficient defluorinative vinylation reaction is uncovered, which leads to the generation of 2-fluoro-1,3-dienes in moderate to good yields with excellent stereoselectivity under mild conditions. Preliminary mechanistic study suggests unique effects of fluorine substituents which allow the reactivity profile not observed with the congeners bearing heavier halides.
Rhodium(iii)-catalyzed C-H allylation of electron-deficient alkenes with allyl acetates
Feng, Chao,Feng, Daming,Loh, Teck-Peng
supporting information, p. 342 - 345 (2015/01/09)
Rhodium-catalyzed C-H allylation of acrylamides with allyl acetates is reported. The use of weakly coordinating directing group resulted in high reaction efficiency, broad functionality tolerance and excellent γ-selectivity, which opens a new synthetic pathway for the access of 1,4-diene skeletons.