Novel building block, furan-annelated 3-sulpholene; Diels–Alder reactions of 4, 6-dihydrothieno [3, 4-c] furan s, s-dioxide

…, K Kubomura, H Fuchii, H Takayama

Index: Suzuki, Takayoshi; Kubomura, Kan; Fuchii, Hideyuki; Takayama, Hiroaki Journal of the Chemical Society, Chemical Communications, 1990 , # 23 p. 1687 - 1689

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Abstract

The preparation of the hitherto unknown 4,6-dihydrothieno[3,4-c]furan S,S-dioxide 1 and its intermolecular Diels-Alder reactions with typical dienophiles are described. ... In the course of our studies on the chemistry of 2,5-dihydro- thiophene S, S-dioxide (3-sulpholene),1 we synthesized the previously unknown furan-annelated 3-sulpholene 1 , the precursor of the furan analogue of o-quinodimethane .2 This compound 1 contains furan and 3-sulpholene moieties, both of which are readily ...