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Note | Regular issue | Vol 55, No. 4, 2001, pp.775-780
Published online, 1st January, 1970
DOI: 10.3987/COM-00-9140
Two Tricyclic Adducts from Consecutive Additions of Dimethyl Acetylene-dicarboxylate to 2,4-Di-t-butyl-3a,5a-dihydro-3H-cyclobuta[b]pyrrole: A Novel Formation of Cyclobuta[1’,2’-f]pyrrolo[1,2-b]oxazine Derivative

Shizuka Takami, Kyosuke Satake, and Masaru Kimura*

*Department of Chemistry, Faculty of Science, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530, Japan

Abstract

The tricyclic heterocycles (2) and (3) were newly synthesized by the addition reaction between 2,4-di-t-butyl-3a,5a-dihydro-3H-cyclobuta[b]pyrrole (1) and dimethyl acetylenedicarboxylate (DMAD). The structures were confirmed by the X-Ray structural analyses, and the pathway affording them was also proposed.