Cor Overkempe

The (apparently disrotatory) thermal ring opening of 4-nitro-1-cyclobuten-1 -amines

D. Reinhoudt, S. Harkema, P. V. Eijk, 1988 .

Stereoselective synthesis of cis and trans four-membered cyclic nitrones

D. Reinhoudt, S. Harkema, G. J. V. Hummel, 1988 .