Reference of 76186-04-4, In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, Reference of 76186-04-4, name is (S)-4-Isopropylthiazolidine-2-thione, introducing its new discovery.
Desulfurilative self-coupling reaction of 1,3-thiazolidine-2-thiones and intramolecular non-bonded S?S interaction in the crystallographic structure of the products
An attempt at an asymmetric Pummerer-type reaction of trans-4-benzyloxythiane-1-oxide (1) with 3-trifluoroacetyl-4S-isopropyl-1,3-thiazolidine-2-thione (2) resulted in failure but an attractive desulfurilative self-coupling reaction of 4S-isopropyl-1,3-thiazolidine-2-thione (6) occurred to give 4S-isopropyl-3-(4S-isopropyl-1,3-thiazolin-2-yl)-1,3-thiazolidine-2-thione (5). The same desulfurilative self-coupling reaction of compound 6 or 11 efficiently proceeded by treatment of diphenyl sulfoxide (7a) or methyl phenyl sulfoxide (7b) with 2 or 3-trifluoroacetyl-1,3-thiazolidine-2-thione (8) to afford each corresponding product 5 or 9. Eventually, we found a practically useful method for the synthesis of 5 and 9 by exploiting TiCl4 and sodium salt 12 or 13 of 1,3-thiazolidine-2-thiones. Interestingly, intramolecular non-bonded S?S interactions were recognized in the crystallographic structures of 5 and 9.
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Quinuclidine – Wikipedia,
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