作者:Hanneman, Christopher M.、Twilton, Jack、Hall, Melissa N.、Goodwin, Nicole C.、Elward, Jennifer M.、Lynch-Colameta, Tessa、Stahl, Shannon S.
DOI:10.1021/jacs.4c04359
日期:——
corresponding lactams via aerobic dehydrogenation and oxidative coupling with water. The mild reaction conditions tolerate diverse functional groups, enabling application to molecules that cover broad chemical space. The method is showcased in selective functionalization of buildingblocks and complex molecules, including late-stage functionalization of bromodomain inhibitors.
17-92% yields (method A). Alternatively, the amines were first cyclised to the 5-unsubstituted pyrazolo[4,3-c]pyridin-4-ones. Subsequent N-benzylation afforded three of the title compounds in 36-49% yields (method B). The third method comprises a six-step transformation of methyl acrylate into 1-benzylpiperidine-2,4-dione. Treatment of the latter with N,N-dimethylformamide dimethylacetal (DMFDMA) followed
开发了三种合成方法,用于制备作为杂环组胺类似物的1,5-二取代的1,5,6,7-四氢-4 H-吡唑并[4,3 - c ]吡啶-4-酮。第一种方法从易于获得的5-(2-氨基乙基)-1 H-吡唑-4-甲酸甲酯开始,将其进行N-烷基化,然后在碱的存在下将所得仲胺环化,得到17标题化合物-92%的产率(方法A)。或者,首先将胺环化为5-未取代的吡唑并[4,3- c] pyridin-4-ones。随后的N-苄基化以36-49%的产率提供了三种标题化合物(方法B)。第三种方法包括丙烯酸甲酯六步转化为1-苄基哌啶-2,4-二酮。用N,N-二甲基甲酰胺二甲基乙缩醛(DMFDMA)处理后者,然后用甲基,苯基和叔丁基肼将形成的烯胺酮酸催化环化,得到相同的三种标题化合物,产率为79-87%(方法C)。 。 烯酮-环化-烷基化-吡唑并[4,3- c ]吡啶-组胺