155322-96-6Relevant articles and documents
The synthesis and conformational aspects of a novel dioxopiperazine - A possible β-turn constraint
Davies, John S.,Stelmach-Diddams, Malgosia,Fromentin, Regis,Howells, Alun,Cotton, Ron
, p. 239 - 243 (2007/10/03)
The synthesis and conformational aspects of a dioxopiperazine was discussed. The cis configuration of the dioxopiperazine was rationalized using nuclear magnetic resonance (NMR) spectroscopy. Computational energy calculations were performed to explain the reluctance to cyclise of N-terminal partially protected dipeptides containing α, α-amino groups.
Chiral Ligands Containing Heteroatoms. 11. Optically Active 2-Hydroxymethyl Piperazines as Catalyst in the Enantioselective Addition of Diethylzinc to Benzaldehyde
Falorni, Massimo,Satta, Michele,Conti, Sandra,Giacomelli, Giampaolo
, p. 2389 - 2398 (2007/10/02)
Starting from enantiomerically pure serine, a series of (2R,5S) and (2S,5S)-2-hydroxymethyl-5-alkyl piperazines 1-5 were prepared in good yields without any racemization.The use of these compounds as chiral catalysts for the enantioselective addition of d