Brassinolide and its analogs. Part IV. Synthesis of brassinolide analogs with or without the steroidal side chain.

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 1983 English Publisher:Oxford University Press (OUP)Journal:Agricultural and Biological Chemistry, volume 47, pages 97-102 (issn: 0002-1369, eissn: 1881-1280,

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Authors: Michitada KONDO; Kenji MORI;

doi: 10.1271/bbb1961.47.97

Brassinolide and its analogs. Part IV. Synthesis of brassinolide analogs with or without the steroidal side chain.

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Abstract

Four brassinolide analogs were synthesized starting from cholesterol, stigmasterol or pregnenolone. An analog possessing a hydroxyl group at C-17 instead of the steroidal side chain was only 0.001% as active as brassinolide upon lamina-inclination testing with rice seedlings, while other analogs were 1~2% as active as brassinolide. This indicates the indispensable role of the side chain for the plant growth-promoting activity of brassino-steroids.

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