2-Diazohistidinyl thyrotropin-releasing hormone (TRH): a photosensitive TRH analog.


We have synthesized a new thyrotropin releasing hormone (TRH) analog, pGlu-2-diazo-His-Pro-NH2 5, which is a potential photoaffinity label for the TRH receptor. Its precursor, pGlu-2-amino-His-Pro-NH2 4, has been synthesized through successive coupling of a 2-aminohistidine derivative 1 with proline and pyroglutamic acid derivatives. Diazotization of the… (More)


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