3-芳酰基-4-羟基-2-喹诺酮类4和11可以开始进行合成1或9 通过Fries重排的相应的酯的3和10,通过氰化钾和18-冠-6催化。提出了一种一锅法,其中不需要分离酯。用锌粉还原芳基酮4和11导致苄基衍生物5和12。芳基酮4和11与羟胺反应,随后加热粗产物,通过贝克曼热重排和脱水生成恶唑喹诺酮7和14。通过Fries重排不能将2-芳氧基吡啶并[1,2- a ]嘧啶-4-酮17和20转化为相应的酮。
The oxazolo[4,5-c]-quinolinone analog 7 c is the first small-molecule inhibitor of interleukin-33, demonstrated by its binding to the interface of IL-33 and ST2 in a 2D NMR study and a strong inhibition of interleukin-6 production in human mast cells.
A Simple Method for the Synthesis of 5-Methyloxazolo[4,5-<i>c</i>]quinolin-4(5<i>H</i>)-ones
作者:J. R. Merchant、S. S. Shirali
DOI:10.1246/bcsj.50.3075
日期:1977.11
A general and simple method for the synthesis of oxazolo[4,5-c]quinoline-4(5H)-ones by heating 3-amino-4-hydroxy-2-quinolone hydrochloride with aromatic acids in the presence of PPA has been described. The structures are based on spectral and analytical data.