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2005
Sulfuration
O 0245
12- 054
Diselenide-Assisted Sulfuration of Dienes. — 2,3-Diphenylbutadiene (I) reacts with
an excess of diselene a disulfides to form a mixture of di- and tetrasulfides (II) and (III)
along with the thiophene (IV). The sulfurization reaction can be extended to further
dienes using a mixture of diselenides and elemental sulfur as the reagent. Cyclic disulfides are isolated after work-up by desulfurization with PPh3. Interestingly, norbornene
(IX) yields the trisulfide (X) under similar conditions. — (RYS, A. Z.; HOU, Y.;
ABU-YOUSEF, I. A.; HARPP*, D. N.; Tetrahedron Lett. 45 (2004) 50, 9181-9184;
Dep. Chem., McGill Univ., Montreal, Que. H3A 2K6, Can.; Eng.) — Mais
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