通过使用低温,动力学控制的甲硅烷基希尔伯特·约翰逊反应,由4-氰基-3(2H)-哒嗪酮(4)制备了4-氰基-3-氧化-1-β-D-呋喃呋喃糖基吡啶并鎓(10a)然后用甲醇中的NaHCO3解封所得的三乙酸酯衍生物8a。10a显然是嘧啶核苷的内消旋类似物的第一个例子。发现它是小鼠体内的4-氰基-3(2H)-哒嗪酮(4)的尿代谢产物。10a具有25-50 mg / kg ED50的小鼠体内对全身性大肠杆菌感染的革兰氏阴性抗菌活性。合成了一系列4-取代的3-氧化吡啶并鎓核糖核苷11a-h,作为10a的类似物。发现4-氯-3-氧化-1-β-D-呋喃呋喃糖基吡啶并鎓鎓对E的活性是10a的几倍。
[EN] HETEROCYCLYL PYRIDAZINE AS FUNGICIDAL COMPOUNDS<br/>[FR] HÉTÉROCYCLYL-PYRIDAZINE UTILISÉE EN TANT QUE COMPOSÉS FONGICIDES
申请人:BAYER AG
公开号:WO2020127780A1
公开(公告)日:2020-06-25
The present disclosure relates to heterocyclyl pyridazine compounds, processes and intermediates for their preparation as well as the uses thereof for controlling phytopathogenic microorganisms, such as phytopathogenic fungi.
Mesoionic pyridazine ribonucleosides. A novel biologically active nucleoside metabolite
作者:Ronald E. Bambury、Daniel T. Feeley、Gerald C. Lawton、John M. Weaver、James Wemple
DOI:10.1021/jm00378a015
日期:1984.12
Hilbert-Johnson reaction followed by deblocking of the resulting triacetate derivative, 8a, with NaHCO3 in methanol. 10a is apparently the first example of a mesoionic analogue of a pyrimidine nucleoside. It was discovered as a urine metabolite of 4-cyano-3(2H)-pyridazinone (4) in mice. 10a possesses Gram-negative antibacterial activity in vivo against a systemic Escherichia coli infection in mice with
通过使用低温,动力学控制的甲硅烷基希尔伯特·约翰逊反应,由4-氰基-3(2H)-哒嗪酮(4)制备了4-氰基-3-氧化-1-β-D-呋喃呋喃糖基吡啶并鎓(10a)然后用甲醇中的NaHCO3解封所得的三乙酸酯衍生物8a。10a显然是嘧啶核苷的内消旋类似物的第一个例子。发现它是小鼠体内的4-氰基-3(2H)-哒嗪酮(4)的尿代谢产物。10a具有25-50 mg / kg ED50的小鼠体内对全身性大肠杆菌感染的革兰氏阴性抗菌活性。合成了一系列4-取代的3-氧化吡啶并鎓核糖核苷11a-h,作为10a的类似物。发现4-氯-3-氧化-1-β-D-呋喃呋喃糖基吡啶并鎓鎓对E的活性是10a的几倍。