Boron trifluoride etherate → 4,4-Dimethyl-2-(3-nitro-phenyl)-6-trifluoromethyl-1,2,3,4-tetrahydro-quinoline

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Reaction Steps

A mixture of [1-(3-nitro-phenyl)-meth-(E)-ylidene]-(4-trifluoromethyl-phenyl)-amine (18.2 g of crude, 62.1 mmol), isobutene (52 mL, 620.6 mmol) and boron trifluoride etherate (1.6 mL, 12.4 mmol) in acetonitrile in a hydrogenated kettle was stirred for two days at room temperature. The solution was evaporated in vacuo and the residue was crystallized by treating with ethyl acetate to give 5.9 g of 4,4-Dimethyl-2-(3-nitro-phenyl)-6-trifluoromethyl-1,2,3,4-tetrahydro-quinoline (yield: 27.1%).

Provenance & Evidence