Synthesis and Reactions of a Chemical Model of the Urocanase Reaction
作者:Joachim Winter、János Rétey
DOI:10.1002/chem.19970030312
日期:——
Using a convergent synthetic strategy starting from nicotinic acid and imidazole, we have prepared the (E) and (Z) isomers of 1-benzyl-3-carbamoyl-5-[2-(ethoxycarbonylmethylene)-2-(1-(p-to-lylsulfamoyl)imidazol-4-yl)ethyl]pyridinium bromide (21) as models of the urocanase reaction. Domino reactions of both (E)-21 and (Z)-21 led to the same spirocyclic compound, (3aRS)-11-[9-([D7]benzyl)-5-ethoxy-1