... Abstract. Quinonoid 6-methyl- and 6,7-dimethylpterins were synthesized by the chemical oxidation. Some of their properties are described. Download full text in PDF. Tetrahedron Letters,Vol.26,No. 33,pp 4003-4004,1985 0040-4039/85 $3.00 + .00 Printed in Great Britain 985 Pergamon Press Ltd. SYNTHESIS 0F QUINONOID 6-METHYL- AND 6,7-DIMETHYLDIHYDROPTERINS1 Sadao Matsuura*, Takashi Sugimoto, and Shizuaki Murata Department of ...