
TY  - JOUR
A1  - Evans, NA 
A1  - Holt, LA 
A1  - Milligan, B 
T1  - Fluorescent whitening agents. IX.The effect of proteins on the photodecomposition of pyrazolines
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1977
VL  - 30
IS  - 10
SP  - 2277
EP  - 2287
KW  - 
UR  - https://doi.org/10.1071/CH9772277 
N2  - Ultraviolet irradiation of the diaryl-2-pyrazoline (1) in water gives the corresponding pyrazole (3), the 4-hydroxypyrazole (4) and several unidentified products. Irradiation of the tetraaryl-2-pyrazoline (2) gives the pyrazole (6) as the major product. The rates of photodegradation are increased if lysozyme is present and the corresponding pyrazoles are formed preferentially. Pyrazoles are also the major products when wool containing (1) or (2) is irradiated. Both pyrazolines photosensitize the degradation of lysozyme, the tryptophan, histidine and methionine residues being the main sites of attack. 
ER  -

