Organic Letters p. 681 - 683 (2006)
Update date:2022-08-03
Topics:
Sun, Guangxing
Fecko, Christopher J.
Nicewonger, Robert B.
Webb, Watt W.
Begley, Tadhg P.
We have synthesized simple model systems to explore the possibility of photo-cross-linking between the pyrimidine bases and the side chains of the aromatic amino acids. Thymine/phenylalanine and thymine/tyrosine models gave cross-links, and thymine/tryptophan models gave complex mixtures; the cytosine/phenylalanine model was unreactive. The quantum yields for the model cross-linking reactions were 18-46 times smaller than those for thymine dimer formation. Biphotonic excitation contributes little to the yield of these reactions.
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