Nucleophilic Substitution Reactions of Alkyl Halides by Using New Polymer-Supported Reagents Containing Hemin
作者:Kiyoshi Saito、Kaoru Harada
DOI:10.1246/bcsj.62.2562
日期:1989.8
hemin, divinylbenzene, and 2-methyl-5-vinylpyridine was synthesized by suspension copolymerization. Substitution reactions of primary, secondary, and tertiary alkylhalides with the hemin copolymer combined with cyanide, azide, and thiocyanate ions were given satisfactory yields. This reaction mechanism was revealed to be a SNi type on the basis of stereochemical study. The hemin copolymer was not only
Kinetics and mechanisms of nucleophilic displacements with heterocycles as leaving groups. Part 10. Reactions of s-alkyl primary amines with pyryliums
作者:Alan R. Katritzky、Jorge Marquet、Jeremy M. Lloyd、James G. Keay
DOI:10.1039/p29830001435
日期:——
α-phenylbenzylamine forms the corresponding carbonium ions which may be trapped by nucleophiles. Isolated 1-cycloalkylbenzoquinoliniums (2) solvolyse but the SN1 mechanism (for five-, six-, and seven-membered rings): for the cyclobutyl case an SN2 reaction is also found.
2,4,6-三苯基吡啶与仲烷基胺可制得可分离的吡啶鎓(吡啶鎓被亲核试剂取代为S N 2并消除为烯烃)。与1-苯基乙胺和α-苯基苄基胺形成的2,4,6-三苯基吡啶鎓形成相应的碳离子,这些碳离子可能被亲核试剂捕获。分离的1-环烷基苯并喹啉鎓盐(2)溶剂分解但具有S N 1机理(对于五元,六元和七元环):对于环丁基,还会发现S N 2反应。
The Isomerization of Alkyl Thiocyanates to Isothiocyanates
作者:Peter A. S. Smith、David W. Emerson
DOI:10.1021/ja01497a025
日期:1960.6.1
Berg-Nielsen,K. et al., Acta Chemica Scandinavica (1947), 1972, vol. 26, p. 15 - 20
作者:Berg-Nielsen,K. et al.
DOI:——
日期:——
Barroeta,N. et al., Gazzetta Chimica Italiana, 1972, vol. 102, p. 467 - 491