Abstract
Heating of an equimolar mixture of 3,5-di-tert-butyl-1,2-benzoquinone with thiosalicylic acid led to 2-[(4,6-di-tert-butyl-2,3-dihydroxyphenyl)thio]benzoic acid. In the case of β-mercaptopropionic acid, 2-[(4,6-di-tert-butyl-2,3-dihydroxyphenyl)thio]propionic acid was formed, which upon reflux in Ac2O was converted to 6,8-di-tert-butyl-9-hydroxy-3,4-dihydro-2H-1,5benzoxathiepin-2-one.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 0727—0730, March, 2016.
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Ukhin, L.Y., Suponitsky, K.Y., Shepelenko, E.N. et al. Reactions of 3,5-di-tert-butyl-1,2-benzoquinone with mercapto carboxylic acids. Russ Chem Bull 65, 727–730 (2016). https://doi.org/10.1007/s11172-016-1363-6
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DOI: https://doi.org/10.1007/s11172-016-1363-6