N1CCCCC1.[OH-].C([N+](C)(C)C)C1C=CC=CC=1.[CH:19]([N:21]([CH2:25][CH:26]=[CH2:27])[CH2:22][CH:23]=[CH2:24])=[O:20].[SH2:28]>CO>[CH:19]([N:21]1[CH2:25][CH:26]([CH3:27])[S:28][CH:23]([CH3:24])[CH2:22]1)=[O:20]Piperidine (10 ml) and 10 ml of a 40% solution of benzyltrimethylammoniumhydroxide in methanol were added to a solution of N-formyl-diallylamine (55 g) in methanol (200 ml). Hydrogen sulfide (50 g) was introduced into the resulting solution, and unreacted hydrogen sulfide was kept at reflux for 7 hours by means of "cold finger". The mixture was left at room temperature for 48 hours, flushed with nitrogen, diluted with ether, and washed with water. The organic phase was dried, and the solvent evaporated in vacuo. Distillation of the residue gave the title compound with boiling point 145° C./15 mmHg.
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