Add time:08/21/2019         Source:sciencedirect.com

4-S-Cysteinylphenol (4-CP) has been shown to exert selective toxicity to melanocytes, causing growth inhibition of experimental malignant melanoma. 4-S-Cysteinyl-[U-14C]phenol (4-[U-14C]CP) has now been synthesized by reaction of [U-14C]phenol with excess l-cystine in HBr. After crystallization of unreacted cystine from the reaction mixture, 4-[U-14C]CP was recovered by HPLC in 57.6% radiochemical yield with a specific activity of 26.2 MBq mg−1 (15.2 mCi mmol−1). Radiochemical purity was greater than 99%. 2-S-Cysteinyl-[U-14C]phenol (2-[U-14C]CP), a side product with no antimelanoma activity, was recovered in 6% radiochemical yield.

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