OCTADECYL ESTERS OF MODIFIED HISTIDINE AN D 3-(1,2,4-TRIAZOLYL-3)ALANINE - SYNTHESIS AND PLANT-GROWTH REGULATING ACTIVITY

Octadecyl esters of modified histidine and its analogue 3-(1,2,4-triaz olyl-3)alanine were - synthesized by the method of mixed anhydrides wi th Boc2O. Based on the energy minimization programme Alchemy II, the p referred conformations of these compounds were calculated and compared with those of paclobutrasol to look for any topochemical resemblance and to predict a possible biological activity. The compounds synthesiz ed did not affect the seed sprouting but some of them increased the we ight of the sprouts formed. All the compounds tested showed a certain biological effect on the stem and root growth.