Synthesis of pyrido-1,2,4-thiadiazines related to antihypertensive 1,2,4-benzothiadiazine-1,1-dioxides
作者:Colin G. Neill、Peter N. Preston、Richard H. Wightman
DOI:10.1016/s0040-4020(98)00841-2
日期:1998.10
Oxidation of 3-phenyl-2H-pyrido[2,3-e]-1,2,4-thiadiazine with sodium hypochlorite and, separately, m-chloroperoxybenzoic acid afforded a 1,1-dioxide and a 5-oxide derivative, respectively. Further examples of such 1,1-dioxide derivatives were synthesised by treating 2-amino-5-methylpyridine with orthoesters and these were subsequently oxidised to novel 1, 1,5-trioxides. A short route has been developed
3-苯基-2-氧化ħ -吡啶并[2,3- ë ] -1,2,4-噻二嗪用次氯酸钠,并且单独中号氯过氧酸,得到1,1-二氧化物和5-氧化物衍生物,分别。例如1,1-二氧化物衍生物的另外的实例是由处理2-氨基-5-甲基吡啶与原酸酯合成和这些随后氧化为新颖1,1,5-三氧化物。已开发出一种合成4-氨基吡啶-3-磺酰胺的捷径,该路线用于制备4 H-吡啶[4,3- e] -1,2,4-噻二嗪1,1-二氧化物; 该系列的母体的氧化得到1,1,7-三氧化物衍生物。制备了3-氨基吡啶-4-磺酰胺,然后与原甲酸三乙酯缩合,得到4 H-吡啶并[3,4- e ] -1,2,4-噻二嗪1,1-二氧化物。