Triazines and related products. Part 23. New photo-products from 5-diazoimidazole-4-carboxamide (Diazo-IC)
作者:Julie K. Horton、Malcolm F. G. Stevens
DOI:10.1039/p19810001433
日期:——
Photolysis of Diazo-IC in dilute aqueous solution affords products which differ according to the pH of the medium. At pH 1, or pH 7.4–12 the product is 2-azahypoxanthine (2): in the intervening pH range the product is 4-carbamoylimidazolium-5-olate (3). In the dark only 2-azahypoxanthine is formed. Photolysis of Diazo-IC in concentrated solution containing citric acid (1 mol equiv.) at pH 2.5 affords
重氮-IC在稀水溶液中的光解产生的产物根据介质的pH值而有所不同。在pH 1或pH 7.4-12时,该产品为2-氮杂泛黄嘌呤(2):在中间的pH范围内,该产品为4-氨基甲酰咪唑-5-油酸酯(3)。在黑暗中仅形成2-氮杂泛黄嘌呤。将重氮-IC在含有柠檬酸(1摩尔当量)的pH值为2.5的浓溶液中进行光解,得到褐红色的咪唑基咪唑并咪唑鎓盐(8)和2-氮杂y并黄嘌呤。