The Ever??Elusive Tetra??tert??butylethene (TTBE, 3, 4??Di??tert??butyl??2, 2, 5, 5??tetramethylhex??3??ene): Further Insight on Its Preparation

O Klein, H Hopf, J Grunenberg

Index: Klein, Oliver; Hopf, Henning; Grunenberg, Jorg European Journal of Organic Chemistry, 2009 , # 13 p. 2141 - 2148

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Citation Number: 5

Abstract

Abstract Diketone 4 was prepared by hydrolysis of hexendiyne 5, the latter being available through McMurry coupling of acetylenic ketone 26. Upon treatment with dimethyltitanium dichloride, 4 cyclizes into fully alkylated furan derivative 30; the still unknown tetra-tert- butylethene (1, TTBE, 3, 4-di-tert-butyl-2, 2, 5, 5-tetramethylhex-3-ene) was not produced. The structural properties of 4 and the mechanism of its cyclization into 30 are discussed.(© ...