Azetidine and oxetane sulfinate salts are easily prepared from commercially available 3-iodoheterocycle precursors in a three-step sequence. They undergo smooth coupling reactions thereby providing an expedient route for the introduction of these four-membered heterocycles into indoles.
A. M. A. Nassoy, P. Raubo and J. P. A. Harrity, Chem. Commun., 2015, 51, 5914 DOI: 10.1039/C5CC00975H
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