Thionation using fluorous Lawesson's reagent.

Zoltán Kaleta, Brian T Makowski, Tibor Soós, Roman Dembinski

Index: Org. Lett. 8(8) , 1625-8, (2006)

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Abstract

[reaction: see text] Thionation of amides, 1,4-diketones, N-(2-oxoalkyl)amides, N,N'-acylhydrazines, and acyl-protected uridines with the use of a fluorous analogue of the Lawesson's reagent leads to thioamides, thiophenes, 1,3-thiazoles, 1,3,4-thiadiazoles, and acyl-protected 4-thiouridines. The isolation of the final products in high yields is achieved in most cases by a simple filtration (fluorous solid-phase extraction).