benzyl 2(S)-<5(R)-ethyl-3(S)-methyl-5-(5(S)-(methoxymethylenoxy)-6(S)-methyl-2(R)-tetrahydropyranyl)-2(S)-tetrahydrofuryl>butyl ether 在
盐酸 作用下,
以
四氢呋喃 、
水 为溶剂,
反应 16.0h,
以92%的产率得到benzyl 2(S)-<5(R)-ethyl-3(S)-methyl-5-(5(S)-hydroxy-6(S)-methyl-2(R)-tetrahydropyranyl)-2(S)-tetrahydrofuryl>butyl ether