Photochemistry of 6-formylpterine in alkaline medium.

A. THOMAS; G. SUAREZ; F. CABRERIZO; A.L. CAPPARELLI

HELVETICA CHIMICA ACTA

Año: 2001 vol. 84 p. 3849 - 3860

0018-019X

6-formylpterin solutions at pH 11 were photolyzed at 350 nm at room temperature. The photochemicalreactions were followed by UV/VIS spectrophotometry, thin layer chromatography (TLC), and highperformance liquid chromatography (HPLC). In the presence of oxygen, 6-carboxypterin is the onlyphotoproduct detected by the analytical techniques mentioned. In the absence of oxygen, a new compound showing an absorbance maximum at 480 nm is observed. The latter compound is thermally oxidized very fast in the presence of oxygen to 6-carboxypterin. The quantum yields of substrate disappearance and of photoproduct formation are reported