Derivate des Imidazols, VII. 2,3‐Dihydro‐1,3,4,5‐tetramethyl‐2‐methylen‐1<i>H</i>‐imidazol als Kupplungsreagens. Die Kristallstruktur von Bis(1,3,4,5‐tetramethyl‐2‐imidazolyl)methylium‐iodid

Abstract

Imidazole Derivatives, VII. – 2,3‐Dihydro‐1,3,4,5‐tetramethyl‐2‐methylen‐1 H ‐imidazole as Coupling Reagent. The X‐ray Structure of Bis(1,3,4,5‐tetramethyl‐2‐imidazolyl)methylium Iodide 2,3‐Dihydro‐1,2,3,4‐tetramethyl‐2‐methylen‐1 H ‐imidazole ( 1 ) reacts with 1,3,4,5‐tetramethyl‐2‐(methylthio)imidazolium iodide ( 4 ) in the presence of pyridine to give bis(1,3,4,5‐tetramethyl‐2‐imidazolyl)methylium iodide ( 5 ) which is also formed by the reaction of 4 and methyl lithium in the ratio 2:3. The X‐ray structure of 5 is reported.