D. Damour et al., A convenient synthetic route to macrocyclic cis-3-phenylproline derivatives as mimics of sandostatin (R), SYNLETT, (2), 1999, pp. 189-192
Enantiomerically pure 14- and 20-membered cyclic proline derivatives 2a-d w
ere conveniently prepared from cis-3-phenylproline using macrolactonisation
or macrolactamisation reactions.