摘要:
Selective reduction of the C-8=C-14 double bond in 3-hydroxyergosta-8(14),22-dien-15-one, followed by cis-hydroxylation of the double bond in the side chain and reduction of the 15-oxo group gave new 3 beta-hydroxy-6-deoxobrassinosteroids, their 22S,23S isomers, and the corresponding esters. The side chain in the products is identical to that in such known natural brassinosteroids as 24-epibrassinolide and 24-epicastasterone.