Intramolecular alkylation of 3- and 4-halogenoalkyldiphenylphosphine sulfides. Ring-chain halogenotropic tautomerism of 2,2-diphenyl-1,2λ4-thiaphospholanium and 2,2-diphenyl-1,2λ4-thiaphosphorinanium iodides
Аннотация:
Heating of 3- and 4-chloroalkyldiphenylphoshine sulfides 1a,b with sodium iodide in acetone leads to 2,2-diphenyl-1,2λ4-thiaphospholanium iodide 2a and 2,2-diphenyl-1,2λ4-thiaphosphorinanium iodide 2b; relatively uncommon ring-chain halogenotropic tautomerism is observed in solutions of these compounds.