title: Rh(I) -Catalyzed Cyclizative Addition Reaction of 1,6-Enyne and Sulfonyl Chloride by Carbophilic Activation.
abstract: The π-acid-catalyzed cyclizations of 1,n-enynes by carbophilic activation have been extensively studied and appear as highly attractive processes, yet the cases within a catalytic cycle based on redox principle are rare. Herein, we report the cyclizative addition reactions of 1,6-enynes and sulfonyl chlorides by using a [Rh(cod)Cl/dppf] (dppf=1,1'-bis(diphenylphosphino)ferrocene) catalyst system. The process features the involvement of oxidative addition of sulfonyl chloride to Rh(I) catalyst, which generates [(dppf)(RSO2 )RhCl2 ] as a π-acid species to trigger cyclizative addition in a 6-endo-dig manner by carbophilic activation. Moreover, the catalytic protocol is also applicable to 1,6-diene analogues.
authors.affiliation: College of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China.
authors.forename: Mengyao
authors.initials: M
authors.lastname: Dang
authors.affiliation: College of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China.
authors.forename: Longlei
authors.initials: L
authors.lastname: Hou
authors.affiliation: College of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China. txf@cczu.edu.cn.|Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, 213164, P. R. China. txf@cczu.edu.cn.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Tong
keywords: 1,6-dienes; 1,6-enynes; cyclizative addition; rhodium catalysis; sulfonyl chloride