Cysteamine → 1-Hexyl-3-(2-thiazolidinyl)-4-methoxy-6-methyl-2(1H)-quinolinone

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Reaction Steps

A solution of 1 -hexyl-3-formyl-4-methoxy-6-methyl-2(1H)-quinolinone (Step (2) of Example 1, 1 g) and 2-aminoethanethiol (0.26 g) in methylene chloride (20 ml) containing p-toluenesulfonic acid (0.1 g) was stirred for 3hrs. The mixture was washed with aqueous sodium bicarbonate, dried, evaporated and then crystallized from ether-hexane to give 1-Hexyl-3-(2-thiazolidinyl)-4-methoxy-6-methyl-2(1H)-quinolinone. That the expected product was obtained was confirmed by the spectral data: MS: m/e 360 (M+); NMR (CDCl3): δ3.17 (m, 2H, CH2S), 3.86 (m, 2H, CH2N), 6.0 (d, 1H, S-CH-N).

Provenance & Evidence