PREPARATION OF SOME 2,4,6-CYCLOHEPTATRIENE-1-YL KETONES. STRONG PREFERENCE FOR THE NORCARADIENE ISOMER IN THE CASE OF THE 2,4,6-CYCLOHEPTATRIENE-1-YL t-BUTYL KETONE

Article abstract of DOI:10.1016/S0040-4039(00)94872-X

t-Butyl, i-propyl and phenyl 2,4,6-cycloheptatriene-1-yl ketone (1a,c,d, respectively) have been synthesized.At -139 deg C, rather unexpectedly, the t-butyl ketone 1a exists in a 1:1 equilibrium with its norcaradiene isomer 2a.