3-(3,4-dichlorophenyl)-3-(2-ethyl-3-oxo-2,3-dihydro-1H-isoindol-1-yl)propionaldehyde → 3-[1-(3,4-Dichlorophenyl)-3-(4-(2-oxopiperidino)piperidino)propyl]-2-ethyl-2,3-dihydroisoindol-1-one hydrochloride

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Reaction Steps

A solution of 3-(3,4-dichlorophenyl)-3-(2-ethyl-3-oxo-2,3-dihydro-1H-isoindol-1-yl)propionaldehyde (0.476 g) was treated with 4-(2-oxopiperidino)piperidine (0.945 g) as described in Example 8. The resulting material was not purified by chromatography but was transformed into the hydrochloride to give title compound (0.51 g); mp 135-140° C. (dec); MS: m/z=558(M+1); NMR(CD3OD): 1.22 (m,3), 2.2 (m,12), 3.0 (m,11), 4.5 (m,1), 5.04 (d,1, J=3.85), 7.27 (m,7). Analysis for C29H35Cl2N3O2.HCl.H2O: Calculated: C, 59.74; H, 6.56; N, 7.20; Found: C, 59.77; H, 6.33; N, 6.83.

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