The synthesis of 1 is illustrated in Scheme I. The Diels-Alder addition of 2 to the diene 314 in tetrahydrofuran at-20" C for 24 h gave the adduct 4, mp 147-148" C, in 76%~ ie1d. l~ Treatment of 4 (650 mg, 2.1 mmol) with DDQ (715 mg, 3.15 mmol) in CC14 at 25" C for 20 h followed by chromatography on silica gel (CH2C12) afforded a yellow solid, which was purified by column chromatography using silica gel (hexane, benzene) and then ...
![1a-bromo-9a-chloro-1a,2,3,8,9,9a-hexahydro-1H-cyclopropa[b]anthracene Structure](https://image.chemsrc.com/caspic/189/88180-96-5.png)
![1H-Cycloprop[b]anthracene, 1a-bromo-9a-chloro-1a,2,9,9a-tetrahydro Structure](https://image.chemsrc.com/caspic/151/88180-97-6.png)