Suguru Takatsuto, Hiroki Kuriyama, Takahiro Noguchi, Hiroyuki Suganuma, Shozo Fujioka and Akira Sakurai
The putative intermediates in brassinolide biosynthesis, 22α-hydroxycampesterol 1, 6-deoxocathasterone and its 6α-hydroxylated compound 3, as well as cathasterone 4, are synthesized from a known (22E,24S)-6β-methoxy-3α,5-cyclo-5α-ergost-22-ene 5.