This reaction, so far as we know, has no analogy except, perhaps, in the recently discovered photolytic condensation of phosgene or oxalyl chloride with cyclohexane.* Only ethers capable of undergoing the rearrangement4 also take part in the condensation, and it is evident that there is some common factor in the two reactions. The hypothesis here advanced to account for the behavior of a-methoxystyrene is that both the rearrangement ...
![Benzenebutanoicacid, g-[2-(aminocarbonyl)hydrazinylidene]-,ethyl ester Structure](https://image.chemsrc.com/caspic/082/7497-67-8.png)