(-) (2aR,4S)-6-(2-oxazolyl)-4-(di-n-propylamino)-1,2,2a,3,4,5-hexahydrobenz[cd]indole → (-) (4R)-6-(2-oxazolyl)-4-(di-n-propylamino)-1,3,4,5-tetrahydrobenz[cd]indole

Participants

Reaction Steps

A solution of 0.65 g (2.0 mmol) of (-)(2aR,4S)-6-(2-oxazolyl)-4-(di-n-propylamino)-1,2,2a,3,4,5-hexahydrobenz [cd]indole in 30 ml of CH2Cl2 was sonicated (50-55 KHz) in the presence of 2.5 g of MnO2 for 5 hours. The oxidant was removed by filtration through celite. The crude product obtained after filtering and removing the solvent was chromatographed over 15 g of silica gel using 1:9 EtOAc/toluene, then crystallized from isooctane to provide 0.24 g of title compound.

Provenance & Evidence