Abstract
2-[Allyl(but-3-en-1-yl, pent-4-en-1-yl)sulfanyl]pteridin-4(3Н)-ones at heating in polyphosphoric acid undergo an intramolecular cyclization affording respectively 9-methyl-8,9-dihydro-5H-[1,3]thiazolo[3,2-a] pteridin-5-one and 10-methyl(ethyl)-9,10-dihydro-5Н,8Н-[1,3]thiazino[3,2-a]pteridin-5-ones of angular structure. The cyclization of 2-(alkenylsulfanyl)pteridin-4(3Н)-ones under the action of iodine or arylsulfenyl chlorides afforded iodo(arylsulfanyl) derivatives of angularly fuzed thiazolo- and thiazinopteridines.
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Original Russian Text © I.V. Dyachenko, R.I. Vas’kevich, A.I. Vas’kevich, S.V. Shishkina, M.V. Vovk, 2016, published in Zhurnal Organicheskoi Khimii, 2016, Vol. 52, No. 5, pp. 755–762.
For communication XV, see [1].
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Dyachenko, I.V., Vas’kevich, R.I., Vas’kevich, A.I. et al. Fused pyrimidine systems: XVI. Electrophilic intramolecular cyclization of 2-(alkenylsulfanyl)pteridin-4(3H)-ones. Russ J Org Chem 52, 745–752 (2016). https://doi.org/10.1134/S1070428016050225
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DOI: https://doi.org/10.1134/S1070428016050225