Research on the chemistry of 2-hetarylbenzimidazoles. 5. Acylation of 1-methyl-2-(2?-hetaryl)benzimidazoles
作者:M. M. El'chaninov、A. M. Simonov、L. Ya. Oleinikova
DOI:10.1007/bf00505746
日期:1983.10
ELCHANINOV, M. M.;SIMONOV, A. M.;OLEJNIKOVA, L. YA., XIMIYA GETEROTSIKL. SOEDIN., 1983, N 10, 1311-1313
作者:ELCHANINOV, M. M.、SIMONOV, A. M.、OLEJNIKOVA, L. YA.
DOI:——
日期:——
Design and Syntheses of Palladium Complexes of NNN/CNN Pincer Ligands: Catalyst for Cross Dehydrogenative Coupling Reaction of Heteroarenes
作者:Vikki N. Shinde、Nattamai Bhuvanesh、Anil Kumar、Hemant Joshi
DOI:10.1021/acs.organomet.9b00695
日期:2020.1.27
of palladium(II) pincer complexes having NNN and CNN coordinationmodes. The new complexes were fully characterized with the help of 1H and 13C1H} NMR, HRMS, and IR spectroscopy. The structure and bonding modes of complexes were further authenticated with the help of single-crystal X-ray diffraction. Thermally robust and moisture-/air-insensitive palladium pincer complexes C1–C4 have been used as
该报告描述了具有NNN和CNN配位模式的新型钯(II)钳形配合物的简单合成。借助1 H和13 C 1 H} NMR,HRMS和IR光谱对新配合物进行了全面表征。借助单晶X射线衍射进一步验证了配合物的结构和键合模式。具有热稳定性且对湿气/空气不敏感的钯夹钳复合物C1 - C4已被用作两个杂芳烃的交叉脱氢偶联(CDC)反应的催化剂,发现非常有效。该催化剂仅用1.0 mol%的催化剂即可成功活化包括苯并咪唑,咪唑,苯并噻唑,咪唑并吡啶,噻吩和呋喃在内的多种杂芳烃的C–H键,仅偶联剂的收率就很高。该催化剂对CHO,COMe,COOMe,COOEt,CONHPh,Me,CN,Br和Cl等官能团具有极好的耐受性。此外,该催化剂可重复使用多达四个反应周期,而效率仅有很小的损失。通过控制实验研究了CDC反应的机理,已表明NNN钳形配体(C5)的乙酸钯类似物是活性催化剂。