Synthesis of tritium labelled 24-epibrassinolide

Labelling of brassinosteroids by isotopes of hydrogen and carbon

The present review will focus on the synthetic efforts made in this field from the time of discovery of labelled BRs until the present day.

The labeling of brassinosteroids by tritium

A convenient method for the synthesis of tritium-labeled brassinosteroids with very high specific activity is reported.

Synthesis of [26-2H(3)]brassinosteroids

A number of [26-2H(3)]brassinosteroids were prepared for biochemical studies. The parent, nondeuterated compounds were considered to be biosynthetic intermediates in brassinosteroid biosynthesis. Claisen rearrangement was used to construct the steroidal side chain. Deuterium was introduced by reducing the corresponding intermediates with lithium aluminium deuteride.