Hexane → Ethyl 2-Cyano-3-(5,6,7,8-tetrahydro-1-isoquinolylamino)-acrylate

Participants

Reaction Conditions

Reaction Steps

A solution of 1-amino-5,6,7,8-tetrahydroisoquinoline [2.96 g., 0.02 mole; E. Ochiai and Y. Kawazoe, Pharm. Bull. (Tokyo), 5, 606 (1957)] and ethyl ethoxymethylenecyanoacetate (3.38 g., 0.02 mole) in toluene (8 ml.) was heated by means of an oil bath maintained at 105° C. for 15 minutes. The cooled solution was poured into Skellysolve B (175 ml.) with good stirring. The mixture was triturated and cooled with an ice bath. The mixture was filtered and the collected gummy solid recrystallized from cyclohexane to give the title compound (4.1 g., 75%), m.p. 116°-120° C. The product was recrystallized from cyclohexane to give analytical material, m.p. 121°-123° C.

Provenance & Evidence