4-溴苯甲酰氯 、
(4bS,8aS)-4b,5,6,7,8,8a-hexahydro-4-hydroxy-2-(2-hydroxyethyl)-1,4b,8,8-tetramethylphenanthrene-3,9-dione 在
吡啶 作用下,
反应 4.5h,
以29 mg的产率得到2-[(4bS,8aS)-3,4b,5,6,7,8,8a,9-octahydro-4-hydroxy-1,4b,8,8-tetramethyl-3,9-dioxophenanthren-2-yl]ethyl 4-bromobenzoate