(2aR,2bS,6bS,6cR)-2a,2b,6b,6c-Tetramethyl-2-oxo-2a,2b,3,6,6b,6c-hexahydro-2H-1-oxa-2λ4-thia-benzo[a]cyclopropa[cd]pentalene-4,4,5,5-tetracarbonitrile 120.0 ℃
、6.67 Pa
条件下,
以55%的产率得到1-Acetyl-1,2,3-trimethyl-4,7-dihydro-1H-indene-5,5,6,6-tetracarbonitrile