2,3-Dichloro-5,6-dicyano-1,4-benzoquinone → HCID 69270022, compound

Participants

Reaction Conditions

Reaction Steps

Dissolve 4-(6-chloro-2,3-dihydroindol-1-yl)-piperidine-1-carboxylic acid tert-butyl ester (3.1 g, 9.2 mmol) in tetrahydrofuran (50 mL) and cool to 0° C. under nitrogen. Dissolve DDQ (2.1 g, 1 eq) in tetrahydrofuran (25 mL) and add dropwise to the reaction over 15 minutes. Stir for 30 minutes at 0° C. Dilute with ethyl acetate then wash with saturated sodium bicarbonate followed by brine. Dry over magnesium sulfate, filter and concentrate to give 3.15 g (102%) crude product. MS (ES, m/z): 279.1 (M+1, product—tert butyl).

Provenance & Evidence