A convenient preparation of 3-chloro-4-acyl-3-sulfolenes and their use in the synthesis of thieno-, pyrazoio- and isoxazoio-3-suifolenes as equivalents to the heterocyclic o-quinodimethanes are described.
H. Tso, N. Yang and Y. Chang, J. Chem. Soc., Chem. Commun., 1995, 1349 DOI: 10.1039/C39950001349
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