The Correlation between the Antitumor Activities and Chemical Structures of Thiocyanato Derivatives of Purines and Their Ribonucleosides

Abstract
The effect of 14 thiocyanato derivatives of purines and their ribonucleosides were compared with the effects of 6-purine-thiol and 2-amino-6-purimethiol against transplanted sarcoma (NF-Sarcoma) in mice and the correlation was noted between antitumor activities and substituting position of thiocyanato group and other substituent groups on the purine ring. 6-Thiocyanatopurine, 2-amino-6-thiocyanatopurines and their ribonucleosides were demonstrated as the most active of the thiocyanato derivatives.