1996•Liebigs AnnalenRequires access
The First Tetrathio‐Substituted Cyclobutane‐1,2,3,4‐tetracarbonitrile — A New Highly Substituted Cyclobutane
Anke Spannenberg, Hans‐Jürgen Holdt, Joachim Teller, Klaüs Praefcke, Jürgen Kopf
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Abstract
Abstract The first tetrathio‐substituted cyclobutane‐1,2,3,4‐tetracarbonitrile 9 was obtained by an intramolecular photoinduced [2 + 2] cycloaddition reaction of the 14‐membered macrocyclic tetrathioether 7 containing two 1,2‐dicyano‐1,2‐dithioethene units in dichloromethane in 73% yield.