Author's Organization：Laboratory of Chemistry for Natural Products, Tokyo Institute of Technology Laboratory of Chemistry for Natural Products, Tokyo Institute of Technology Laboratory of Chemistry for Natural Products, Tokyo Institute of Technology Laboratory of Chemistry for Natural Products, Tokyo Institute of Technology
28-Norbrassinolide (2α, 3α, 22R, 23R-tetrahydroxy-B-homo-7-oxa-5α-cholestan-6-one), which is an analog of the plant growth promoting steroidal lactone, brassinolide, was synthesized via 22R, 23R-dihydroxycholesterol. Syntheses of the other C-22, 23 stereoisomers of 22, 23-dihydroxycholesterol were also described.
