L) iamcyclobutatic 11as been prepared by the reaction of N-cyclobutyl-nT-nitrosourea with alkoxides. lhe diazo corup~ und f (lrms-yclol~ utaiione azine on thermal decomposition, cyclobutyl phenyl ketone on reaction with bcnzaldehydc, and a mixture of ethyl spirohexane- 1-carboxylate and ethyl@-cyclobutylacrylates on reaction with ethyl acrylate. The reactions of the diazo compound with carboxylic acids in ether give mixtures of products which ...