Unexpected transformation of 1,5-benzodiazepine derivatives under imidazo-annulation reaction conditions
作者:Mantas Jonušis、Aušra Vektarienė、Gema Mikulskienė、Simona Jonušienė、Dalia Vektarytė、Regina Jančienė
DOI:10.1007/s10593-023-03194-y
日期:2023.5
imidazo[1,5-a][1,5]benzodiazepine-3-carboxylic acid esters by activation of the amide group of the heterocycle to iminophosphate and its cyclocondensation with ethyl isocyanoacetate, unexpected 5-substituted ethyl oxazole-4-carboxylates were obtained as the main products. Structures of the novel oxazole derivatives were confirmed by IR, 1H, 13C, and 31P NMR, and mass spectra, and the reaction course was
在尝试通过将杂环的酰胺基活化为亚氨基磷酸酯并与异氰基乙酸乙酯环缩合来合成咪唑并[1,5-a][1,5]苯并二氮杂卓-3-羧酸酯的新衍生物时,意想不到的5-取代主要产品为4-甲酸乙基恶唑酯。新型恶唑衍生物的结构通过IR、1 H、13 C和31 P NMR以及质谱得到证实,并使用计算分子建模技术合理化反应过程。