Benzocaine → Ethyl 4-[3-butyl-3-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)-ureido]-benzoate

Participants

Reaction Conditions

Reaction Steps

A solution of butyl-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)-carbamoyl chloride (9) (368 mg, 0.55 mmole) in 30 mL pyridine was treated with 272 mg of ethyl p-aminobenzoate (3 eq.) and stirred at 40° C. for 15 hours. The reaction mixture was concentrated in vacuo to provide an orange oil which was purified by flash chromatography (SiO2, 2.5% methanol/dichloromethane) which yielded 131 mg (54%) of ethyl 4-[3-butyl-3-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)-ureido]-benzoate (11) as a pale yellow oil.

Provenance & Evidence