Diels–Alder reactions between hexafluoro-2-butyne and bis-furyl dienes: kinetic versus thermodynamic control†
Kseniya K. Borisova,Eugeniya V. Nikitina,Roman A. Novikov,Victor N. Khrustalev,Pavel V. Dorovatovskii,Yan V. Zubavichus,Maxim L. Kuznetsov,Vladimir P. Zaytsev,Alexey V. Varlamov,Fedor I. Zubkov
Chemical Communications Pub Date : 02/02/2018 00:00:00 , DOI:10.1039/C7CC09466C
Abstract

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.

Graphical abstract: Diels–Alder reactions between hexafluoro-2-butyne and bis-furyl dienes: kinetic versus thermodynamic control