The preparation of 3b,4a,7b,8a‐tetrahydro‐4H,8H ‐pyreno[4,5‐b:9,10‐b']bisazirine and of 1a,6b,7a,12b‐tetrahydro‐1H,7H‐dibenz[3,4:7,8]anthra[1,2‐b:5,6‐b']bisazirine is described. The corresponding diepoxides were reacted with sodium azide in aqueous acetone and the mixtures of trans‐azido alcohols, so formed, were cyclized by tri‐n‐butylphosphine.
Pyren (I) führt zu einem Diepoxid (II), das mit Natriumazid/Wasser/Aceton zu den Addukten (III) führt und weiter mit Tributylphosphin zum Diimin (IV) cyclisiert wird.
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