Diels–Alder reactions between hexafluoro-2-butyne and bis-furyl dienes: kinetic versus thermodynamic control
2018
Borisova, Kseniya K. | Nikitina, Eugeniya V. | Novikov, Roman A. | Khrustalev, Victor N. | Dorovatovskii, Pavel V. | Zubavichus, Yan V. | Kuznetsov, Maxim L. | Zaytsev, Vladimir P. | Varlamov, Alexey V. | Zubkov, Fedor I.
The tandem [4+2] cycloaddition between hexafluoro-2-butyne and bis-furyl dienes, like difurfuryl ester, at room temperature leads to the kinetically controlled “pincer”-adducts – annulated 4a,8a-bis(trifluoromethyl)hexahydro-1,4:5,8-diepoxynaphthalenes. On the other hand, if these reactions proceed at 140 °C, only the thermodynamically controlled “domino”-adducts – annulated 2,3-bis(trifluoromethyl)hexahydro-1,4:5,8-diepoxynaphthalenes – are formed. Therefore, a very rare and unexpected example of full kinetic and thermodynamic control in the Diels–Alder reaction is reported in this paper.
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