benzyl 2(R)-<5(S)-carbomethoxy-3(R)-methyl-5-<5,6-dihydro-5(R)-(methoxymethoxy)-6(R)-methyl-2(S)-pyranyl>-2(R)-tetrahydrofuryl>butyl ether 在
platinum on activated charcoal
氢气 作用下,
以
乙酸乙酯 为溶剂,
反应 12.0h,
以89%的产率得到benzyl 2(R)-<5(S)-carbomethoxy-3(R)-methyl-5-<5(R)-(methoxymethoxy)-6(R)-methyl-2(S)-tetrahydropyranyl>-2(R)-tetrahydrofuryl>butyl ether