Pteridines. IX. Hydrolytic Ring Cleavage of 3-Benzyl-6,7-dipheny1-4 (3H)-pteridinone 131 E., C TAYI OK, JK R ~ i ~ rir , ~ \O\L\ZStK 2.3, l%jl B project at present under investigation in this Laboratory is the conversion of N-substituted amides of 3-aminopyrazinoic acids into 3-substi- tuted 4(3H)-pteridinones. One compound of the latter type, 3-benzyl-6,7-diphenyl-4( 3H)-pteri- dinone (I), has already been reported.' 111 an attempt to prepare I by an ...
