1-(NN-Dimethylaminomethyl)-2-formylcymantrene (AFCMT) has been resolved into enantiomers which gave copper complexes with GlyGly which were alkylated with acetaldehyde; hydrolysis of the resulting dipeptides gave threonine with an asymmetric yield of 92–98% and chiral AFCMT in the presence of copper ions partially retroracemises (R,S)-Ala–(R,S)-Nva.
Yu. N. Belokon, I. E. Zel'tzer, N. M. Loim, V. A. Tsiryapkin, Z. N. Parnes, D. N. Kursanov and V. M. Belikov, J. Chem. Soc., Chem. Commun., 1979, 789 DOI: 10.1039/C39790000789
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