3,4-二氢-2H-吡喃 、
2S,3R-6-(2-hydroxyethylidene)-2-methyl-2-(4,8-dimethyl-5-hydroxy-7-nonenyl)-oxepan-3-ol 在
对甲苯磺酸 作用下,
以
二氯甲烷 为溶剂,
反应 1.5h,
以41.5%的产率得到9-<(2'S,3'R)-3'-(tetrahydro-2H-pyranyloxy)-6'-<(E)-2''-(tetrahydro-2H-pyranyloxy)ethylidene>-2'-methyl-2'-oxepanyl>-2,6-dimethyl-5-(tetrahydro-2H-pyranyloxy)-2-nonene