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Communication | Regular issue | Vol 36, No. 10, 1993, pp.2203-2204
Published online, 1st January, 1970
DOI: 10.3987/COM-93-6444
Ring Expansion of Spirocyclic Dithioketals via 1,3-Sulfur Migration by the Mitsunobu Reaction

Seiichi Takano,* Hirokazu Iida, and Kunio Ogasawara

*Pharmaceutical Institute, Tohoku University, Aobayama, Sendai 980-8578, Japan

Abstract

Treatment of the spirocyclic dithioketals of some β-hydroxy ketone derivatives with diisopropyl azodicarboxylate and triphenylphosphine furnished the ring-expanded products via 1,3-sulfur migration.