Water → 1-methyl-9-methoxy-3,4,5,5a,6,7-hexahydro-2H-naphth[1,2-d]azepin-2one

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Reaction Steps

The starting material is prepared as follows: 19.2 ml of tetramethyl-ethylenediamine are added under nitrogen to 53.3 ml of 2.4 M n-butyl lithium in hexane at room temperature and the mixture is allowed to react for 15 minutes. Thereupon the solution of 10.9 g of 1-(2-isopropylaminopropyl)-3,4,5,5a,6,7-hexahydro-9-methoxy-2H-naphth[1,2-d]azepin-2-one in 160 ml of anhydrous tetrahydrofuran is added dropwise. The mixture is refluxed for 30 minutes and subsequently cooled in an ice bath. 120 ml of water are added dropwise and the mixture is stirred with cooling for 30 minutes. The precipitate is collected, washed with water and diethyl ether and dried, to yield the 1-methyl-9-methoxy-3,4,5,5a,6,7-hexahydro-2H-naphth[1,2-d]azepin-2-one melting at 215°-218°.

Provenance & Evidence