Synthesis of 4-substituted 3-hydroxy-and 3-amino-6<i>H</i>-1,2,6-thiadiazine 1,1-dioxides
作者:P. Goya、M. Stud
DOI:10.1002/jhet.5570150214
日期:1978.3
Reaction of sulfamide with ethoxymethylene derivatives yielded 4-ethoxycarbonyl-, 4-cyano-, and 4-nitro-2H,6H-1,2,6-thiadiazine 1,1-dioxide. In some cases, the corresponding open chain sulfamidomethylene derivatives were isolated. Preparation of 4-amino- and 4-amino-5-methyl-2H,6H-1,2,6-thiadiazin-3-one 1,1-dioxide is also described. Reaction of sulfamide with ethyl 3,3-ethoxypropionate afforded 3
磺酰胺与乙氧基亚甲基衍生物的反应产生4-乙氧基羰基-,4-氰基-和4-硝基-2 H,6 H -1,2,6-噻二嗪1,1-二氧化物。在某些情况下,分离出相应的开链磺酰胺基亚甲基衍生物。还描述了4-氨基-和4-氨基-5-甲基-2 H,6 H -1,2,6-噻二嗪-3-酮1,1-二氧化物的制备。磺酰胺与3,3-乙氧基丙酸乙酯反应,得到3,7-双(乙氧羰基甲基)过氢-1,5,2,4,6,8-二硫代四-偶氮1,1,5,5-四氧化物。
The title compounds, bearing an alkyl and/or bromine substituent on nitrogen, were synthesized. Unlike 5-bromo-6-methyluracil, 4-bromo-5-methyl-(2H)-1,2,6-thiadiazin-3-(6H)one 1,1-dioxides have the ability to act as a bromonium ion source.
Rotational isomerism in 6-β-<scp>D</scp>-glucopyranosides of methyl-1,2,6-thiadiazin-3(2H)-one 1,1-dioxides
作者:Pilar Goya、Ana Martinez、M. Luisa Jimeno
DOI:10.1039/p29900000783
日期:——
Glucopyranosides of methyl-1,2,6-thiadiazin-3(2H)-one1,1-dioxides have been synthesized and their rotational isomerism studied. Two of them exist, in solution, as mixtures of syn : anti rotamers, at room temperature. In the case of the diglucoside, the barriers to rotation about both glycosidic bonds have been calculated by dynamic 13C NMR.
已合成了甲基1,2,6-噻二嗪-3(2 H)-1,1-二氧化物的葡糖苷,并对其旋转异构进行了研究。在室温下,它们中的两个以溶液形式存在,即顺式:反旋转异构体的混合物。在二糖苷的情况下,通过动态13 C NMR计算了绕两个糖苷键旋转的障碍。