Umsetzungen von 4-Aminomethylen-5-oxo-2-phenyl-4,5-dihydrooxazol mit Heterocumulenen
作者:I. Thondorf、M. Strube、M. Augustin
DOI:10.1055/s-1990-27126
日期:——
Reactions of 4-Aminomethylene-5-oxo-2-phenyl-4,5-dihydrooxazole with Heterocumulenes The reaction of 4-aminomethylene-5-oxo-2-phenyl-4,5-dihydro-oxazole (1) with various heterocumulenes under basic conditions was examined. Depending on the nature of the heterocumulene different products were obtained. The reaction of 1 with carbon disulfide followed by alkylation yielded only 4-alkylthiomethylene-2-phenyl-5-oxo-4,5-dihydrooxazoles whereas the reaction of 1 with isothiocyanates, isocyanates and carbonyl sulfide led to the formation of 5-benzoylamino-2-thiouracils, 5-benzoylaminouracils and of 5-benzoylamino-2-methylthio-6H-1,3-oxazin-6-one, respectively.
4-氨基亚甲基-5-氧-2-苯基-4,5-二氢恶唑与杂累积双键的反应 在碱性条件下,研究了4-氨基亚甲基-5-氧-2-苯基-4,5-二氢恶唑(1)与各种杂累积双键的反应。根据杂累积双键的性质,得到了不同的产物。1与二硫化碳反应后进行烷基化,只产生4-烷硫基亚甲基-2-苯基-5-氧-4,5-二氢恶唑;而1与异硫氰酸酯、异氰酸酯和碳酰硫反应,则分别形成5-苯甲酰氨基-2-硫尿嘧啶、5-苯甲酰氨基尿嘧啶和5-苯甲酰氨基-2-甲硫基-6H-1,3-恶嗪-6-酮。