Ethyl Acrylate → 3-(1,3,4,14b-tetrahydro-2H-dibenzo[b,f]pyrazino[1,2-d][1,4]thiazepin-2-yl)propionic acid ethyl ester

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Reaction Steps

A mixture of 1,3,4,14b-tetrahydro-2H-dibenzo[b,f]pyrazino[1,2-d][1,4]thiazepine (1.5 g, 5.6 mmol), ethyl acrylate (0.61 g, 6.1 mmol) and ethanol (40 ml) was heated at reflux temperature for 5 minutes and then left to stand for 24 h at room temperature, affording crude 3-(1,3,4,14b-tetrahydro-2H-dibenzo[b,f]pyrazino[1,2-d][1,4]thiazepin-2-yl)propionic acid ethyl ester.

Provenance & Evidence