D46 233

PREPARATION AND REACTIONS OF BIS(TRIFLUOROMETHYL)THIONE S-IMIDES

A. May and H.W. Roesky

Institut fiir Anorganische Chemie der Universitat, Tammannstrasse 4, W-3400 Gijttingen (F.R.G.)

Bis(trifluoromethyl)thione S-imides are synthesised via 1,3-de-

hydrochlorinationl.

CF,

Cl

+ KN/

R + LiN(SiMe$*

CR3 I N-R

FI

R = tBu, tetramethylbutyl-, 1-adamantyl

These compounds are versatile precursors for the preparation of

heterocycles. They undergo [3+2] cycloaddition reactions to afford

five-membered, bis(trifluoromethyl)substituted heterocycles in

high yields.

The heterocyclic compounds are fully characterised by n.m.r. and

elemental analyses, and single crystal X-ray structures of

selected examples will be presen'ted.

Furthermore, the use of & as a ligand in the synthesis of metal

complexes will be discussed.

1 A. May, H.W. Roesky, D. Stalke, F. Pauer, G.M. Sheldrick, Chem. Ber. 123 (1990) 1475.