Polar cycloaddition of monocyclic 1,2-thiazinylium salt and transformation of the cycloadducts to 1,2-azathiabenzenes

Article abstract of DOI:10.1016/S0040-4039(98)02663-X

Deprotonation of the cycloadducts, which were newly obtained from polar cycloaddition of monocyclic 1,2-thiazinylium salt with 1,3-butadienes, with a strong base provided 1,2-azathiabenzenes having sulfur at a bridgehead position.