Collect. Czech. Chem. Commun. 1992, 57, 1731-1738

Brassinosteroids with Ester Function with Five Carbon Atoms at the 20 Position

Ladislav Kohouta and Miroslav Strnadb

a Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Sciences, 166 10, Prague 6
b Institute of Experimental Botany, Czechoslovak Academy of Sciences, 772 00 Olomouc


Pregnane analogues of brassinolide and castasterone have been prepared which have an ester function with five carbon atoms at the 20 position. When tested by the bean second internode bioassay, the most efficient substance is VIII.