(3R',1S,4R,4aR,9aR)-dihydro-4,4-dimethyl-2-oxo-3-furanyl 1,4,4a,9a-tetrahydro-1,4-methano-9,10-dioxo-4a-anthracenecarboxylate 在
四氯化锡 作用下,
以
二氯甲烷 为溶剂,
反应 0.17h,
以65%的产率得到(6bR,9aR)-5-Hydroxy-7,9a-dihydro-6bH-10-oxa-pentaleno[2,1-a]naphthalene-6-carboxylic acid (R)-4,4-dimethyl-2-oxo-tetrahydro-furan-3-yl ester