Benzylic Imidazolidinium, 3,4,5,6-Tetrahydropyrimidinium and Benzimidazolium Salts: Applications in Ruthenium-Catalyzed Allylic Substitution Reactions
作者:Sedat Yasar、Ismail Özdemir、Bekir Cetinkaya、Jean-Luc Renaud、Christian Bruneau
DOI:10.1002/ejoc.200800007
日期:2008.4
Imidazolidinium, tetrahydropyrimidinium and benzimidazolium salts were prepared. Upon reaction with tBuOK, they generate carbene ligands, which were associated in situ to [RuCp*(MeCN)3]PF6 to produce ruthenium catalysts that are active for the substitution of allylic substrates by dimethyl malonate as a carbonucleophile and phenol. The influences of the N-heterocyclic structures, as well as that of
制备了咪唑啉鎓、四氢嘧啶鎓和苯并咪唑鎓盐。与 tBuOK 反应后,它们会生成卡宾配体,这些配体与 [RuCp*(MeCN)3]PF6 原位结合以产生钌催化剂,该催化剂对于丙二酸二甲酯作为亲碳试剂和苯酚取代烯丙基底物具有活性。研究了 N-杂环结构以及苄基 N-取代基对反应性和区域选择性的影响。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)