(3aR,7aS)-4-Bicyclo[2.2.1]hepta-2,5-dien-7-yl-2,2-dimethyl-3a,7a-dihydro-benzo[1,3]dioxole 、
丁炔二酸二甲酯 以
水 为溶剂,
以65%的产率得到(1S,2R,6S,7S)-1-Bicyclo[2.2.1]hepta-2,5-dien-7-yl-4,4-dimethyl-3,5-dioxa-tricyclo[5.2.2.0
2,6]undeca-8,10-diene-8,9-dicarboxylic acid dimethyl ester