35280-90-1Relevant academic research and scientific papers
Structural Studies of Azacyclos derived from Linear Tripeptides
Lucente, Gino,Romeo, Aurelio,Cerrini, Silvio,Fedeli, Walter,Mazza, Fernando
, p. 809 - 816 (2007/10/02)
N-Benzyloxycarbonyl-L-alanyl-L-phenylalanyl-L-proline p-nitrophenyl ester (4) and its N-p-bromobenzyloxycarbonyl analogue (2) each cyclize in alkaline aqueous medium to give a tricyclic system containing a free hydroxy-group derived from intramolecular addition of NH to amide carbonyl.Both the five-membered rings of the tricyclic system assume an envelope conformation.In the six-membered ring only the carbon atom bearing the cyclolic hydroxy-group is out of the plane of the other ring atoms.The benzylic side-chain of the phenylalanine residue adopts an extended conformation in both azacyclols.The crystal and molecular structures and spectral data for the tricyclic compounds (3) and (5) are reported.
