In our study on the soft coral,Alcyonium patagonicum,a new hydroxylated sterol,24-methylenecholest-4-en-3β,6α-diol(1) ......

从豆甾醇出发,先合成了胆甾-5-烯-24-酮-3β-乙酸酯(2);再用过甲酸将2的5,6位双键氧化为环氧化物,后者在碱性条件下立体专一地开环......