3-[(1S,2S,4bS,10aR)-2,4b,8,8,10a-Pentamethyl-2-(tetrahydro-pyran-2-yloxy)-tetradecahydro-phenanthren-1-yl]-propan-1-ol 在
dipyridine chromium trioxide 作用下,
以
吡啶 为溶剂,
反应 5.0h,
以85%的产率得到3-[(1S,2S,4bS,10aR)-2,4b,8,8,10a-Pentamethyl-2-(tetrahydro-pyran-2-yloxy)-tetradecahydro-phenanthren-1-yl]-propionaldehyde