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Paper | Regular issue | Vol 29, No. 7, 1989, pp.1355-1368
Published online, 1st January, 1970
DOI: 10.3987/COM-89-4993
■ Syntheses and Chiroptical Properties of Some New N-(5-benzofurazanoyl)-L-α-amino Acids and Esters

Sadiq A. Saleh* and Mustafa M. El-Abadelah

*Chemistry Department, Yarmouk University, Irbid, Jordan

Abstract

A series of new N-(5-benzofurazanoyl)-L-α-amino acids (Ia) and esters (Ib) have been prepared. The cd spectra of the L-aliphatic and L-aromatic amino acid derivatives (Ia) display, in organic solvents, sign inversion for the measured Cotton effect (CE) bands. Comparable trend is also observed for the respective amino ester analogues (Ib). This chiroptical behaviaur might be attributed to differences in conformational equilibria of either series. 1H-Nmr and ms spectra of the title compounds are discussed.