Preparation and synthetic application of partially protected brassinosteroids.

Vladimir A Khripach, Vladimir N Zhabinskii, Yuliya Y Zhiburtovich, Galina V Ivanova, Olga V Konstantinova, Dmitrii V Tsavlovskii, Sybille Lorenz, Bernd Schneider

Index: Steroids 75(1) , 27-33, (2010)

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Abstract

Preparation of partially protected brassinosteroids is achieved through the reaction of the source material (24-epicastasterone and 24-epibrassinolide) with diol-specific reagents (2,2-dimethoxypropane and methylboronic acid). The obtained products were shown to be useful synthetic intermediates for further preparation of minor representatives of this class of natural phytohormones (such as 3,24-diepicastasterone and 3-dehydro-24-epibrassinolide).