Reaction of 3,4,4,5-tetrachloro-4H-1,2,6-thiadiazine with benzyltriethylammonium chloride
作者:Andreas S. Kalogirou、Maria Manoli、Panayiotis A. Koutentis
DOI:10.1016/j.tetlet.2018.08.007
日期:2018.10
3,4,4,5-Tetrachloro-4H-1,2,6-thiadiazine was reacted with BnEt3NCl (10 mol%) to give perchloro-9-thia-1,5,8,10-tetraazaspiro[5.5]undeca-1,4,7,10-tetraene (up to 18% yield), 4,5,6-trichloropyrimidine-2-carbonitrile (up to 44% yield) and four minor side products: 2,7-dichlorothiazolo[5,4-d]pyrimidine-5-carbonitrile, 2-(4-chloro-6H-thiazolo[5,4-c][1,2,6]thia-diazin-6-ylidene)malononitrile, 4,8-dichloropyrrolo[2′
使3,4,4,5-四氯-4 H -1,2,6-噻二嗪与BnEt 3 NCl (10 mol%)反应,得到全氯9-thia-1,5,8,10-四氮杂螺[5.5 ] undeca-1,4,7,10-四烯(产率高达18%),4,5,6-三氯嘧啶-2-甲腈(产率高达44%)和四种次要副产物:2,7-二氯噻唑[ 5,4 - d ]嘧啶-5-腈,2-(4-氯-6 H-噻唑并[5,4- c ] [1,2,6]噻二嗪-6-亚丙基)丙二腈,4,8 -二氯吡咯并[2',1':2,3]咪唑[4,5- c ] [1,2,6]噻二嗪-6,7-二腈和4,7-二氯-[1,2,6]噻二嗪[3,4- b ] thiazolo [5,4- e ] [1,4] diazepin-9(10 H)-一。单晶X射线研究支持次要产品的结构。这些次要产物的形成和8-溴-4-氯吡咯并[2',1':2,3]咪唑[4,5- c ] [1,2,6]噻二嗪-6,给出了7-二腈。