By reaction of 5H-dibenzo[a,d]cyclohepten-5-one oxime (I) with beta-methylaminoethyl chloride (II) in a solution of sodium in methanol.
By decomposition of O-beta-(N-methyl-N-carbethoxy)aminoethyl-5H-dibenzo[a,d]cyclohepten-5-one oxime (III) with KOH in carbitol. Compound (III) can be prepared as follows: 5H-ibenzo[a,d]cyclohepten-5-one oxime (I) is treated with beta-dimethylaminoethyl chloride (IV) in sodium methoxide to give O-beta-dimethylaminoethyl-5H-dibenzo[a,d]cyclohepten-5-one oxime (V), which is treated with ethyl chlorocarbonate in anhydrous benzene.
beta-Methylaminoethanol (VI) is treated with ethyl chlorocarbonate in triethylamine to give ethyl N-methyl-hydroxyethylcarbamate (VII), which is treated with thionyl chloride to give ethyl-N-methyl-beta-chloroethylcarbamate (VIII). Compound (VIII) is treated with 5H-dibenzo[a,d]cyclohepten-5-one oxime (I) and the resulting product is decomposed without isolation.