Unsaturated arylcarbodiimides

Some substituted unsaturated arylcarbodiimides undergo intramolecular cyclization. For example, the vinyl carbodiimide 63 acts as an azadiene to undergo a 6 7r-electrocycli-zation on heating at 140 °C to form an intermediate, which rearomatizes to give 1-amino-isoquinolines 64." ... 

Table 3.1 Intramolecular Cyclization Reactions of Unsaturated Arylcarbodiimides...

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