摘要通过1-苯基-3-烷基苯并咪唑鎓盐与Pd(OAc)2在二甲亚砜中的反应,以非常高的收率合成了新型钯N-杂环卡宾(NHC)配合物(1a–e)。这些合成的复合物使用元素分析,FT-IR,1 H NMR,13 C NMR和LC-MS(对于1a,1c和1e)光谱数据进行了充分表征。另外,通过单晶X射线衍射对结构的双[1-苯基-3-(2-甲基-1,4-苯并二恶烷)苯并咪唑-2-亚丙基]二溴钯(II)的分子结构进行了表征。学习。新的Pd II配合物(1a–e)在130°C的条件下,在2-正丁基呋喃,2-正丁基噻吩和2-正丙基噻唑与各种芳基溴的直接C5芳基化反应中用作催化剂进行了测试。还,为了进行比较,使用芳基氯化物进行了一些实验。结果报告在本文中。在给定条件下,这些配合物表现出相当高的催化活性。
Synthesis and characterization of 1-phenyl-3-alkylbenzimidazol-2-ylidene salts and their catalytic activities in the Heck and Suzuki cross-coupling reactions
摘要:
The synthesis and characterization of 1-phenyl-3-alkyl-substituted carbene precursors that were prepared from 1-phenyl substituted benzimidazole and various alkyl halides are reported. The new benzimidazolium salts (1a-e) were characterized by H-1 NMR, C-13 NMR, FT-IR spectroscopic methods and elemental analyses. New in situ generated palladium-benzimidazolium complexes were tested for catalytic activity in the Mizoroki-Heck and Suzuki-Miyaura cross-coupling reactions.
Synthesis and characterization of 1-phenyl-3-alkylbenzimidazol-2-ylidene salts and their catalytic activities in the Heck and Suzuki cross-coupling reactions
摘要:
The synthesis and characterization of 1-phenyl-3-alkyl-substituted carbene precursors that were prepared from 1-phenyl substituted benzimidazole and various alkyl halides are reported. The new benzimidazolium salts (1a-e) were characterized by H-1 NMR, C-13 NMR, FT-IR spectroscopic methods and elemental analyses. New in situ generated palladium-benzimidazolium complexes were tested for catalytic activity in the Mizoroki-Heck and Suzuki-Miyaura cross-coupling reactions.