Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Cationic Cyclization to Tricyclene Structures$^\dag$

  • Published : 1987.08.20
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Abstract

Various carbocation-mediated cyclizations to tricyclene structure (basically, tricyclo $[2,2,1,0^{2,6}]$ heptane skeleton) were carried out, starting from protonated species of either 3-methyl-2,5-norbornadiene-2-carboxylic acid (10) or 3-methylene-5-norbornene-2-carboxylic acids (18 and 19). The resulting products were individually converted to ${\pi}$-iodotricyclene (35), a pivotal intermediate in almost all syntheses of tricyclene terpenes.

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