benzyl 2(S)-<5(S)-carbomethoxy-3(S)-methyl-5-(5,6-dihydro)-5(S)-(methoxymethylenoxy)-6(S)-methyl-2(R)-pyranyl-2(S)-tetrahydrofuryl>butyl ether 在
Ni(Ra)
氢气 作用下,
以
乙酸乙酯 为溶剂,
反应 3.0h,
以85%的产率得到benzyl 2(S)-<5(S)-carbomethoxy-3(S)-methyl-5-(5(S)-(methoxymethylenoxy)-6(S)-methyl-2(R)-tetrahydropyranyl)-2(S)-tetrahydrofuryl>butyl ether