Studies of Phosphorus Ylides with Tetramethylthiuram Disulfide.

Abstract In contrast to the behaviour of the entitled disulfide (1) toward Wittig reagents (2a, b) , which undergoes direct and simple nucleophilic displacement reactions giving 7a, b, 8 and 9 as the final products, an extensive decomposition occurred when the same disulfide was treated with ylides 2c, d , furnishing the adducts 7c, d, 8 and 12 or 14 , respectively. The given structures were based upon analytical, chemical and spectroscopic results. Organic disulfides; tetramethylthiuram disulfide, Wittig reaction, thiaphosphirans.