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Communication | Regular issue | Vol 19, No. 7, 1982, pp.1233-1236
Published online, 1st January, 1970
DOI: 10.3987/R-1982-07-1233
Revised Structure of Physoperuvine, an Alkaloid of Physalis peruviana Roots

Anil B. Ray, Yoshiteru Oshima, Hiroshi Hikino, and Chizuko Kabuto

*Chemistry Department, Faculty of Science, Banaras Hindu University, Varanasi-221 005, India


The previously reported physoperuvine, an alkaloid isolated from the roots of Physalis peruviana, has been found to be a hydrochloride and its structure has been settled as 3 by X-ray analysis. The forms of existence of physoperuvine, a free base, and its hydrochloride have been studied, revealing that while the salt remains exclusively in the amino-alcohol form (3), the free base is an equilibrium mixture of the amino-alcohol (1) and the amino-ketone (2), the equilibrium being shifted toward the former.