Thermal rearrangement of 1,4-dithiocyanatobut-2-enes, available by either thiocyanogenation of 1,3-dienes or from ?,4-dihalogenobut-2-enes, affords vicinal thiocyanatoisothiocyanates, which are trapped to give thiazolidinones or dihydrothiazoies, or indirectly aminothiols.
Durch Thiocyanogenierung der 1,3‐Diene (I) zu den Dithiocyanaten (II) und anschließen‐ l de Cyclisierung mit aromatischen Aminen (III) erhält man die Dihydrothiazole (IV) bzw. (VII).
The dithiocyanatobutenes (I) on heating in MeOH give via (3,3)‐sigmatropic rearrangement, the thiazolidinones (II) which are readily transformed to the aminomercaptobutenes (III).
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