Tetrahedron letters

4, 5-Bis (methylene)-1, 3-dithiole-2-ones from brominated 4, 5-dimethyl-1, 3-dithiole-2-ones: Precursors for tetramethylene-tetrathiafulvalenes

RM Renner, GR Burns

Index: Renner, R. M.; Burns, G. R. Tetrahedron Letters, 1994 , vol. 35, # 2 p. 269 - 272

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Citation Number: 18

Abstract

Abstract Treatment of di-and tetrabromo-1, 3-dithiole-2-ones 7 and 8 with Et 4 NI yields unsubstituted diene 4, trapped as its dimer or a cycloadduct; and dibromodiene 9. Treatment of 8 with DBU gives tribromodiene 10. Spectroscopic evidence indicates that tetramethylene- TTFs are formed by heating 9 and 10 with P (OEt) 3. Diels Alder adducts are formed by 9.