Fused pyrimidine systems: XVII. Arylsulfenylation of 5-allylpyrimidine-4(3H)-one derivatives. Synthesis of arylsulfanyl-substituted 5,6-dihydrofuro[2,3-d]- and 6,7-dihydro-5H-pyrano[2,3-d]pyrimidines
作者:A. I. Vas’kevich、M. V. Vovk
DOI:10.1134/s1070428017020221
日期:2017.2
5-Allylpyrimidine-4-ones react with arylsulfenyl chlorides in dichloromethane with the formation of 5-[(2-arylsulfanyl)-3-chloropropyl]-pyrimidine-4-ones that under the action of sodium acetate undergo cyclization into 6-arylsulfanyl-6,7-dihydro-5H-pyrano[2,3-d]pyrimidines. At performing similar reactions in nitromethane an intramolecular electrophilic cyclization occurs affording 6-[(arylsulfanyl)methyl]-5
5-烯丙基嘧啶-4-酮与二氯甲烷中的芳基亚硫酰氯反应,生成5-[(2-芳基硫烷基)-3-氯丙基]-嘧啶-4-酮,在乙酸钠的作用下环化成6-芳基硫烷基- 6,7-二氢-5 H-吡喃并[2,3- d ]嘧啶。在硝基甲烷中进行类似反应时,发生分子内亲电环化,得到6-[[(芳基硫烷基)甲基] -5,6-二氢呋喃[2,3- d ]嘧啶。