Perhaps the most widely employed of these is the former which is particularly useful for the synthesis of alkyl-or arylcyanoketenes. However, attempts to utilize this for the generation of chlorocyanoketene met with failure due to the insolubility of the diazidoquinone precursor. This problem was circumvented by the latter method which employs 4-azido-3-chlorod- methoxy-2 (5H)-furanone (3a), a vinyl azide which is easily prepared and readily cleaves ...
![7-Chloro-7-cyanobicyclo[4,2,0]octan-8-one Structure](https://image.chemsrc.com/caspic/473/89937-15-5.png)
