functional groups (alkoxy/hydroxy and cyano/ester) are presented. Two groups of the title compounds were synthesised via aminolysis of 5-bromouracil and, subsequently, either coupling with an alkylating agent (2-chloromethoxyethyl acetate), or Michael-type addition to acrylonitrile/methyl acrylate. The reverse sequences for both syntheses were also studied. The target molecules were designed as non-nucleoside
A general and facileroute to new trisubstituted purin-8-ones A facile general route was developed to synthesise new trisubstituted purin-8-one derivatives starting from cheap and readily available 5-bromouracil. These fused planar heterocycles present key hydrogen bond donating/accepting functionalities, making them interesting scaffolds for binding to biological targets.
Synthesis of 1-(aryloxyalkyl)- 5-(arylamino)uracils
作者:A. A. Ozerov、M. S. Novikov、A. K. Brel'、G. N. Solodunova
DOI:10.1007/bf02290947
日期:1998.5
Synthesis of substituted uracils by the reactions of halouracils with selenium, sulfur, oxygen and nitrogen nucleophiles under focused microwave irradiation
Undermicrowaveirradiation, the nucleophilic substitutionreactions of halouracils with selenium, sulfur, oxygen and nitrogen nucleophiles was complete within several minutes with yields up to 99%. The method using microwaveirradiation is superior to those conducted under conventional heating processes.
A facile synthesis is reported for the construction of the five- and six-membered fused carbamate rings of an oxazolo[5,4]pyrimidin-2-one and a pyrimido[5,4][1,3]oxazin-2-one, respectively. The method utilises a controlled two-step procedure in which a reactive p-nitrophenylcarbamate intermediate ring closes upon treatment with base, affording the bicyclic pyrimidine-carbamate scaffolds in good yields.