Abstract
The behaviour of several tetraenic propellanes 1b–d in their reactions with a variety of dienophiles has been studied. It appears that for the imides 1b–c the dienophile adds to the face of the cyclohexadiene ring adjacent to the imide ring (from “above”) whilst for the ether 1d it adds to the face adjacent to the other cyclohexadiene ring (from “below”).
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