Tetrahedron Letters p. 7691 - 7694 (1996)
Update date:2022-08-03
Topics:
Schmittel, Michael
Kiau, Susanne
Siebert, Torsten
Strittmatter, Marc
The thermal reaction of enyne-allenes 1 with large substituents (tert.-butyl, trimethylsilyl) at the acetylene terminus leads to C2-C6 cyclization products presumably via an intermediate benzofulvene biradical, whereas with a hydrogen substituent the expected Myers-Saito cycloaromatization product is formed. Effective DNA strand scission can be observed when no intramolecular pathway is available.
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