... Please enable JavaScript to use all the features on this page. Tetrahedron. Volume 26, Issue 20, 1970, Pages 4691–4696. Cover image Cover image. Cyclopropyl conjugation with chelate ring of β-diketones. ... Chem. Rev. (1962), p. 419. 2; EM Kosower, M. Ito; Proc. Chem. Soc. ...