马来酸酐 、
tetramethyl 2a,3-dihydro-10-methyl-3,5a-methano-5aH-cyclobutanaphthalene-1,2,4,5-tetracarboxylate 以
xylene 为溶剂,
反应 18.0h,
以32%的产率得到2a,3,6,7,8,9-hexahydro-12-methyl-6,9-etheno-3,5a-methano-5aH-cyclobuta
naphthalene-1,2,4,5,7,8-hexacarboxylic acid cyclic 7,8-anhydride tetramethyl ester