A new, general approach for the synthesis of heteroannulated 3,1-oxazin-4-ones
摘要:
Beta-(N-Triphenylphosphoranyliden)-enamino esters afford the synthetically useful heteroannulated 3,1-oxazin-4-ones with aroyl chlorides in different solvents. The reaction proceeds in one step and in high yields and appears to be independent of the reactivity of the heterocyclic substrate.
A new, general approach for the synthesis of heteroannulated 3,1-oxazin-4-ones
摘要:
Beta-(N-Triphenylphosphoranyliden)-enamino esters afford the synthetically useful heteroannulated 3,1-oxazin-4-ones with aroyl chlorides in different solvents. The reaction proceeds in one step and in high yields and appears to be independent of the reactivity of the heterocyclic substrate.
One-Pot Three-Component Synthesis of bis[2-(methylthio)-7-oxothiazolo[4,5-d]pyrimidin-6(7H)-yl]benzenes
作者:Zheng Dong Fang、Di Fang、Jing Zheng
DOI:10.3184/174751913x13668217942382
日期:2013.6
2-methylthio-4-[(triphenylphosphanylidene)amino] thiazole-5-carboxylate with aromatic diisocyanates and secondary amines produced novel bis[2-methylthio-7-oxothiazolo[4,5-d]pyrimidin-6(7H)-yl]benzenes in the presence of EtONa in 67–93% yields. This method provides an effective synthesis of nitrogen-containing heterocycles with the advantages of mild reaction conditions, simple operation and good yields. The structures
Beta-(N-Triphenylphosphoranyliden)-enamino esters afford the synthetically useful heteroannulated 3,1-oxazin-4-ones with aroyl chlorides in different solvents. The reaction proceeds in one step and in high yields and appears to be independent of the reactivity of the heterocyclic substrate.