Synthesis of (pyrimidin-4-yloxy)- and (pyrimidin-3-yl)acetyl azides and their rearrangement to carbamates and ureas
作者:Virginija Jakubkiene、Zana Kacnova、Milda Malvina Burbuliene、Povilas Vainilavicius
DOI:10.3998/ark.5550190.0011.b04
日期:——
On nitrosation of (pyrimidin-4-yloxy)and (pyrimidin-3-yl)acetohydrazides 2, 3 with sodium nitrite in diluted hydrochloric acid at 0-5 °C the corresponding (pyrimidinyl)acetyl azides 5, 6 were prepared. Azides 5, 6 undergo Curtius rearrangement in the reactions with alcohols, phenols, arylamines or water to give carbamates 7-9, 11-14 or ureas 15-21.
(嘧啶-4-基氧基)和(嘧啶-3-基)乙酰肼2、3在稀盐酸中在0-5°C下用亚硝酸钠亚硝化,制备相应的(嘧啶基)乙酰基叠氮化物5、6。叠氮化物 5、6 在与醇、酚、芳胺或水的反应中发生 Curtius 重排,得到氨基甲酸酯 7-9、11-14 或脲 15-21。