Unexpected formation of 4-alkyl-5-(4-alkylthiosemicarbazido)-4,5-dihydro-1,2,4-triazine-3(2H)-thiones from 1,3-dialkyl-4,5-bis-(4-alkylthiosemicarbazido)imidazolidin-2-ones in acidic medium
摘要:
4-Alkyl-5-(4-alkylthiosemicarbazido)-4,5-dihydro-1,2,4-triazine-3(2H)-thiones are obtained either by heating 1,3-dialkyl-4,5-bis(4-alkylthiosemicarbazido)imidazolidin-2-ones in acidic medium or the reaction of 1,3-dialkyl-4,5-dihydroxyimidazolidin-2-ones with 4-methylthiosemicarbazide.
Abstract A newsyntheticroute to (E)-1,3-dialkyl-4-(benzylideneamino)-5-thioxohexahydroimidazo[4,5-d]imidazol-2(1H)-ones (thioglycolurils), by a ring contraction reaction of 5,7-dialkyl-3-thioxoperhydroimidazo[4,5-e]-1,2,4-triazin-6-ones with aromatic aldehydes, has been developed. A newsyntheticroute to (E)-1,3-dialkyl-4-(benzylideneamino)-5-thioxohexahydroimidazo[4,5-d]imidazol-2(1H)-ones (thioglycolurils)
摘要 (E)-1,3-二烷基-4-(苄叉氨基)-5-硫代六氢咪唑并[4,5 - d ]咪唑-2(1 H)-酮(硫代糖醇)的新合成路线已经开发了具有芳族醛的5,7-二烷基-3-硫代杂氢咪唑并[4,5- e ] -1,2,4-三嗪-6-。 (E)-1,3-二烷基-4-(苄叉氨基)-5-硫代六氢咪唑并[4,5 - d ]咪唑-2(1 H)-酮(硫代糖醇)的新合成路线已经开发了具有芳族醛的5,7-二烷基-3-硫代杂氢咪唑并[4,5- e ] -1,2,4-三嗪-6-。
Cyclization of 1,3-dialkyl-4,5-bis(1-thiosemicarbazido)-imidazolidin-2-ones(thiones) with aromatic aldehydes
作者:Galina A. Gazieva、Sergei V. Vasilevskii、Pavel A. Belyakov、Yulia V. Nelyubina、Elena D. Lubuzh、Angelina N. Kravchenko
DOI:10.1016/j.mencom.2010.09.016
日期:2010.9
Cyclization of 1,3-dialkyl-4,5-bis(1-thiosemicarbazido)imidazolidin-2-ones(thiones) with aromatic aldehydes under acidic catalysis affords 1,3-dialkyl-4-(arylideneamino)-5-thioxohexahydroimidazo[4,5-d]imidazol-2(1H)-ones and 5,7-dialkyltetrahydro-1H-imidazo[4,5-e]-1,2,4-triazine-3,6(2H,4H)-dithiones.