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CATIONIC RING CONTRACTION OF SEVEN-MEMBERED CYCLE OF 3,4-DIHYDRO-2H-1,5-BENZOXATHIEPINE DERIVATIVES

Taras M. Tarasiuk, Olena O. Shyshkina, Lyudmila M. Potikha, Yulian M. Volovenko
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Abstract


A number of 1,4-benzoxathiine derivatives was obtained using ring contraction of seven-membered cycle of 3,4-dihydro-2H-1,5-benzoxathiepin-3-ol derivatives. This synthetic approach allowed to obtain the corresponding alkene, alcohol, nitrile, chloride, bromide, azide, and amine.

 


Keywords


1,5-benzoxathiepine, 1,4-benzoxathiine, episulfonium intermediate, medium-ring compounds, rearrangement, ring contraction.

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