Dopamine quinone chemistry: a study of the influence of amide, amidine and guanidine substituents [-NH-CX-Y] on the mode of reaction
作者:Edward J. Land、Almudena Perona、Christopher A. Ramsden、Patrick A. Riley
DOI:10.1039/b819367c
日期:——
The influence of N-substituents on the mode of reaction of ortho-quinones generated by oxidation of N-substituted dopamine derivatives 8 has been studied. Ortho-quinones with amide, urea or guanidine side chains are relatively stable, with evidence of rearrangement to para-quinomethanes. The N-methylthiourea derivative 11 rapidly cyclises giving a bicyclic product 12. The trichloromethylamidine derivative