18624-64-1Relevant academic research and scientific papers
Cobalt modified N-doped carbon nanotubes for catalytic C=C bond formation via dehydrogenative coupling of benzyl alcohols and DMSO
Li, Jinlei,Liu, Guoliang,Shi, Lijun,Xing, Qi,Li, Fuwei
supporting information, p. 5782 - 5788 (2017/12/26)
The development of heterogeneous, cost-effective and environmentally benign catalysts to construct C=C bonds is highly desirable. We report here Co@N-doped carbon nanotubes (Co@NCNT) as a catalyst for a novel synthesis of styryl sulfides via dehydrogenative coupling of benzyl alcohols and DMSO under anaerobic conditions. This reaction maintains high atom efficiency as the C=C bond is formed without the cracking of the C-S bond. We proposed that Co modified N-doped carbon sites are the active sites, different from traditionally believed metal centers for dehydrogenative C-C coupling. Moreover, the Co@NCNT catalyst could be easily separated and recycled for at least six runs. This work opens up a new application of metal-N-C catalysts in C=C bond-forming reactions in synthetic chemistry.
Zeolite y nanosheet assembled palladium catalysts with high catalytic activity and selectivity in the vinylation of thiophenes
Fu, Wenqian,Feng, Yu,Fang, Zhongxue,Chen, Qun,Tang, Ting,Yu, Quanyong,Tang, Tiandi
supporting information, p. 3115 - 3118 (2016/02/23)
Zeolite Y nanosheets with a micro-meso-macroporous structure were synthesized, and applied in the assembly of a Pd catalyst (Pd/NS-Y) for direct vinylation of thiophenes with high activity and selectivity, as compared to Pd(OAc)2, Pd(NO3)2, and Pd(PPh3)4 catalysts. This feature should be assigned to the highly dispersed Pdδ+ (δ 2+.
Thioketones and Enethiolates by 1,3-Anionic Cycloreversion of Dithiolane Derivatives
Schaumann, Ernst,Ruehter, Gerd
, p. 1159 - 1164 (2007/10/02)
The reactive (ar)aliphatic thioketones 3a-c are generated by cycloreversion of the anions 2 of 1,3-dithiolane-4,5-dicarboxylates 1 and are trapped by mesitonitrile oxide (5) in a 1,3-dipolar cycloaddition to give 7.From the fragmentation of anions 12 of 1,3-dithiolane 1,1-dioxides 11, thiobenzophenone (3d) and thiocamphor (3e) are isolated, wheras thioketones 3a,c with α-hydrogen are deprotonated in situ to provide enethiolates 13.Anions 13 add nitrile oxide 5 to yield thiohydroximates 8.
Dimethyl-α-styrylsulphonium Bromide as a Reaction Intermediate
Chow, Yuan L.,Bakker, Bert H.,Iwai, Kiyoshi
, p. 521 - 522 (2007/10/02)
The addition product of styrene, bromine, and dimethyl sulphide was treated with bases to give the dimethyl-α-styrylsulphonium ion which reacted rapidly with various nucleophiles and also underwent slower base-catalysed rearrangement.
