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Communication | Regular issue | Vol 26, No. 8, 1987, pp.2087-2089
Published online, 1st January, 1970
DOI: 10.3987/R-1987-08-2087
A New Route to (Z)-3-Alkylidene-(S)-6-alkyl-2,5-piperazinediones via N-Carboxy-α-dehydroamino Acid Anhydrides

Chung-gi Shin, Yasuchika Yonezawa, and Kazumichi Ogawa

*Departmnet of Applied Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan


A new synthetic method for (Z)-3-alkylidene-(S)-6-alkyl-2,5-piperazinediones was accomplished by the coupling of N-carboxy-α-dehydroamino acid anhydrides with Boc-α-amino acid, followed by the deprotection of Boc group and by the ring expansion.