Retro-ene reactions .4. Alkylation of 4,5-dichloro-1-hydroxymethylpyridazin-6-one with alpha,omega-dibromoalkanes or 4,5-dichloro-1-(omega-bromoalkyl)pyridazin-6-ones
Alkylation of 4,5-dichloro-1-hydroxymethylpyridazin-6-one (1) with alpha,omega-dibromoalkanes 2 or omega-bromoalkylpyridazin-6-ones 3 via a fragmentation of the retro-ene type under the two restricted conditions was investigated.