The Synthesis of the Kynurenamines K1 and K2, Metabolites of Melatonin
作者:Gary Amiet、Helmut M. Hügel、Faizul Nurlawis
DOI:10.1055/s-2002-20476
日期:——
An efficient synthesis of the kynurenamines K1 and K2, the major brain and antioxidant metabolites of melatonin 1 is described. Regioselective lithiation of tert-butyl(4-methoxyphenyl) carbamate and iodination provided the (2-iodoaryl)carbamate which when coupled with N-acetyl-propargylamine underwent a Sonogashira reaction. Simultaneous alkyne hydration and N-formylation produced K2, whereas alkyne hydration only, produced K2.