The present invention provides novel 1,2-dioxetanes derived from spiro-fused ketones with or without .pi.-electrons in the ring or with carbon-carbon double bond(s) in the spiro-fused ring. Additionally, these new dioxetanes have electron donating or withdrawing groups at the four-membered peroxide ring to render these dioxetanes active at all sites.

La presente invenzione fornisce il romanzo 1,2-dioxetanes derivato dai chetoni spiro-fusi o senza pi.-elettroni nell'anello o il bond(s) del doppio del carbonio-carbonio nell'anello spiro-fuso. Ulteriormente, questi nuovi dioxetanes hanno elettrone donare o ritirare i gruppi al four-membered l'anello del perossido per rendere questi dioxetanes attivi a tutti i luoghi.

 
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