Example 005

Thermal electrocyclic ring-opening of cis-3,4-dimethylcyclobutene gives (E,Z)-2,4-hexadiene

Thermal electrocyclic ring-opening of <em>cis</em>-3,4-dimethylcyclobutene gives (<em>E</em>,<em>Z</em>)-2,4-hexadiene
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R. E. K. Winter, Tetrahedron Lett., 1965, 1207–1212
DOI: 10.1016/S0040-4039(01)83997-6

J. I. Brauman and W. C. Archie, J. Am. Chem. Soc., 1972, 94, 4262–4265
DOI: 10.1021/ja00767a038