2,5-二羟基苯甲酸甲酯 、
[(E)-3-[(3aR,6aR)-spiro[3a,6a-dihydrofuro[2,3-d][1,3]dioxole-2,1'-cyclohexane]-5-yl]-2-methylprop-2-enyl] acetate 在
silver(l) oxide 作用下,
以100%的产率得到methyl (7R,8S,12R,16R)-8-(acetyloxymethyl)-3,6-dihydroxy-8-methylspiro[11,13,15-trioxatetracyclo[8.6.0.02,7.012,16]hexadeca-1,3,5,9-tetraene-14,1'-cyclohexane]-7-carboxylate