Diphenyl diselenide and diphenyl ditelluride were reduced by samarium (11)

No abstract

1991organo-tellurium compounds, isocyclic C derivatives organo-tellurium compounds, isocyclic C derivatives S 0144 -193Samarium(II) Iodide-Induced Reductive Cleavage of Se-Se and Te-Te Bond in Diphenyl Diselenide and Ditelluride Leading to a Samarium Phenylselenolate and Tellurolate: Preparation of Unsymmetrical Alkyl Phenyl Selenides and Tellurides.-Reduction of diphenyl diselenide (Ia) and ditelluride (Ib) with samarium diiodide produces samarium benzeneselenolate (IIa) and benzenetellurolate (IIb) which react with the alkyl iodides (III) to give the unsymmetrical alkyl phenyl selenides and tellurides (IV). Reaction of (Ia) and samarium diiodide with α,β-enones, such as 2cyclohexenone (V) and methyl vinyl ketone (VII), leads under 1,4-addition to formation of the 3-phenylseleno ketones (VI) and (VIII), respectively. -(FUKUZAWA, S.; NIIMOTO, Y.; FUJINAMI, T.; SAKAI, S.; Heteroat. Chem. 1 (1990) 6, 491-495; Dep. Mat. Sci., Fac. Eng., Shizuoka Univ., Hamamatsu, Shizuoka 432, Japan; EN)

A Facile Cyclopropanol Synthesis from β-Halo Ester with Grignard Reagent. Samarium(II) Diiodide Couple. -Ethyl β-bromopropionate (I) undergoes samarium diiodide-promoted cyclization reaction with the Grignard compounds (II) to produce the 1-substituted cyclopropanols (III) which are converted into the trimethylsilyl ethers (V). (Mechansim). -(FUKUZAWA, S.; NIIMOTO, Y.; SAKAI, S.; Tetrahedron Lett. 32 (1991) 52, 7691-7694; Dep. Appl. Chem., Fac. Sci. Eng., Chuo Univ., Kasuga, Tokyo 112, Japan; EN)