[2.2](2,5)Pyrazinophanes: Synthesis and Molecular Structure
作者:Uwe Eiermann、Claus Krieger、Franz A. Neugebauer、Heinz A. Staab
DOI:10.1016/s0040-4039(00)82146-2
日期:——
The pseudoortho (4a) and the pseudogeminal [2.2](2,5)pyrazinophane (4b) have been synthesized via 1,6-Hofmann elimination of [(5-methyl-2-pyrazinyl)methyl]trimethylammonium hydroxide (2b) and dimerization of the generated 2,5-dihydro-2,5-bis(methylene)pyrazine (3). The molecular structures of both isomers, 4a and 4b were determined by X-ray analysis.