Synthesis of 5,6-dihydro-4H-1,3,5-dithiazines, 2,3-dihydro-6-thioxo-6H-1,3-thiazine, and 6-amino-1,3-dithiins
作者:P. D. Howes、J. J. Payne、M. Pianka
DOI:10.1039/p19800001038
日期:——
3-thiazine-5-carboxylate (18). The dithiolates (20), derived from cyanoacetic ester, or (10), derived from acetophenone, interacted with formaldehyde and cyanoacetic esters or with 2-cyanoacrylates to form 6-amino-1,3-dithiins (26) or iminodithians (28). Methyl 6-amino-2-[(1 -cyano-1-ethoxycarbonyl)methylene]-1,3-dithiin-5-carboxylate (26; R1= Et, R2= Me) formed N-acyl derivatives with aliphatic acid chlorides. On
衍生自含有活性亚甲基或磺酰胺基,二硫化碳和氢氧化钠或氢氧化钾的化合物的二硫醇盐(1)或(2)与甲醛和伯胺进行曼尼斯(Mannish)反应形成5,6-二氢-1, 3,5-二噻嗪(3)或(4)。衍生自乙酰乙酸乙酯的二硫醇盐(12)在上述条件下环化为2,3-二氢-3,4-二甲基-6-硫代氧-6 H -1,3-噻嗪-5-羧酸乙酯(18)。衍生自氰基乙酸酯的二硫醇盐(20)或衍生自苯乙酮的二硫醇盐(10)与甲醛和氰基乙酸酯或2-氰基丙烯酸酯相互作用形成6-氨基-1,3-二硫辛(26)或亚氨基二噻吩(28) 。6-氨基-2-[((1-氰基-1-乙氧基羰基)亚甲基] -1,3-二硫基-5-羧酸甲酯(26; R 1 = Et,R 2= Me)与脂族酰氯形成N-酰基衍生物。在氧化时,二硫精(26; R 1= Et,R 2= Me)收缩成2-氰基-2-(4-氰基-1,3-二硫代噻吩-5-亚烷基)乙酸乙酯(31)。