Diethylformamide → 2-(5-oxo-5H-dibenzo[a,d]cyclohepten-2-yl)propionyl chloride

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Reaction Steps

1.0 G. of 2-(5-oxo-5H-dibenzo[a,d]cyclohepten-2-yl)propionic acid is dissolved in 25 ml. of chloroform, and 1 ml. of thionyl chloride and 0.1 ml. of diethylformamide are added thereto. The mixture is left for 1 hour then evaporated under high vacuum to afford 2-(5-oxo-5H-dibenzo[a,d]cyclohepten-2-yl)propionyl chloride. In similar manner, substituting the acids prepared in Preparations 3 and 5-8 for the 2-(5-oxo-5H-dibenzo[a,d]cyclohepten-2-yl)propionic acid used above, the corresponding acid chlorides are prepared.

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