... Chem., Vol. 50, No. ... Scheme V 1 r Me0 (19) See, for example: Barton, J. W. In "Non-Benzenoid Aromatics"; Snyder, JP, Ed.; Academic Press: New York, 1969; pp 45-49. ... together, the data here enhance our understanding of the rich and varied chemistry of the azabiphenylenes. ...