The incorporation of tritiated (+)-tembetarine chloride (reticuline methochloride) into sinomenine (in Sinomenium acutum) and into protopine (in Dicentra spectabilis) has been determined. By comparison with (+)-reticuline, an established intermediate in the biosynthesis of sinomenine and of protopine, (+)-tembetarine is an inefficient precursor.
D. H. R. Barton, R. B. Boar, D. A. Widdowson, V. Deulofeu and S. M. Albonico, J. Chem. Soc. C, 1969, 807 DOI: 10.1039/J39690000807
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