116073-12-2Relevant articles and documents
STERICALLY SCREENED HALOGENOCYCLOBUTANONES. III. -CYCLOADDITION OF DICHLOROKETENE TO CYCLOPROPYL-SUBSTITUTED METHYLENECYCLOPROPANES
Donskaya, N. A.,Bessmertnykh, A. G.,Grushina, O. E.,Lindeman, S. V.,Petrov, V. I.,et al.
, p. 2090 - 2097 (2007/10/02)
The reaction of dichloroketene with cyclopropyl-substituted methylenecyclopropanes leads to good yields of substituted cyclobutanones containing a spiro fragment at position 2.The reaction of the 5,5-dichlorospirohexan-4-ones synthesized in this way with potassium hydroxide leads to 6-hydroxy-5-oxaspiroheptan-4-ones, while the reaction with sodium methoxide makes it possible to synthesize substituted esters of cyclopropanecarboxylic acids.