[N:1]1([CH2:7][CH2:8][CH2:9][O-:10])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[Na+].Cl[C:13]1[S:14][C:15]2[CH:21]=[CH:20][CH:19]=[CH:18][C:16]=2[N:17]=1>O1CCCC1>[N:1]1([CH2:7][CH2:8][CH2:9][O:10][C:13]2[S:14][C:15]3[CH:21]=[CH:20][CH:19]=[CH:18][C:16]=3[N:17]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1Sodium 3-piperidinopropanolate (5 mmol) and 5 mmol of 2-chlorobenzothiazole in 20 ml of dry tetrahydrofurane were refluxed for 12 hours. The suspension was filtered and the solvent evaporated under reduced pressure. The product was crystallized with oxalic acid from diethyl ether/ethanol.
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