HETEROCYCLES

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■ Syntheses and Properties of Chiral Tricyclic Compounds Bridged by Cystine Units

Kazuaki Ito,* Yoshihiro Ohba, and Tyo Sone

*Department of Materials Science and Engineering, Faculty of Engineering, Yamagata University, 4-3-16 Jyonan, Yonezawa 992-8510, Japan

Abstract

Novel chiral tricyclic compounds were prepared from the reactions of the cystine dimethyl ester and 4-substituted 2,6-bis(chloromethyl)phenol derivatives. The ¹H-NMR and CD spectra showed the existence of chiral twisting of the cyclophane unit, which was induced by the chirality of the cystine moiety.