[C:1]([CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH:9]=[CH:10][CH:11]=[O:12])#[N:2].[CH2:13]([O:15][CH:16]([O:19][CH2:20][CH3:21])[CH2:17][SH:18])[CH3:14].C(N(CC)CC)C>C(OCC)C>[C:1]([CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][C:9]([S:18][CH2:17][CH:16]([O:19][CH2:20][CH3:21])[O:15][CH2:13][CH3:14])=[CH:10][CH:11]=[O:12])#[N:2]The starting material is prepared as follows: The mixture of 1.8 g of 9-cyano-2-nonenal, 1.4 g of 2,2-diethoxy-ethane-thiol and 50 μl of triethylamine is allowed to stand at room temperature for 48 hours. It is taken up in 100 ml of diethyl ether, the solution washed with water, dried and evaporated, to yield the 9-cyano-3-(2,2-diethoxy-ethylmercapto)-nonenal, showing in NMR spectrum peaks at 9.78, 4.55, 3.57 and 2.61 ppm.
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