Facile Preparation of 6-Bromopyridine-2-carboxamide and Pyridine-2,6-dicarboxamide: Partial Aminocarbonylation of 2,6-Dibromopyridine
作者:Hiroshi Horino、Hiroyuki Sakaba、Mannosuke Arai
DOI:10.1055/s-1989-27372
日期:——
The palladium-catalyzed carbonylation of 2,6-dibromopyridine in the presence of primary amines under controlled conditions (carbon monoxide pressure) gives mainly N-aryl- or N-alkyl-6-bromopyridine-2-carboxamides accompanied by N,N′-diaryl- or N,N′-dialkylpyridine- 2,6-dicarboxamides. Further aminocarbonylation of the N-aryl- and N- alkyl-6-bromopyridine-2-carboxamides affords unsymmetric N,N′- diaryl, N-alkyl-N′-aryl-, or N,N′-dialkylpyridine-2,6-dicarboxamides.
Hydrophilic and hydrophobic carboxamide pincers as anion hosts
作者:Jessica Lohrman、Subhamay Pramanik、Sandeep Kaur、Hanumaiah Telikepalli、Victor W. Day、Kristin Bowman-James
DOI:10.1039/d1ob01605a
日期:——
“Bare bones” pyridine dicarboxamide and pyrazine tetracarboxamide pincer frameworks were used to probe supramolecular anion binding. The influence of hydrophilic vs. hydrophobic environments and the potential for synergistic interactions in the ditopic hosts were explored.