The Facile Synthesis of 6-Azapurines by Transformation of Toxoflavins (7-Azapteridines)
作者:Tomohisa Nagamatsu、Jun Ma、Fumio Yoneda
DOI:10.3987/com-08-s(f)111
日期:——
- This paper describes a reliable and facile synthesis of 6-azapurines (1,5-dimethyl-1H-imidazo[4,5-e][1,2,4]triazin-6(5H)-ones) by treatment of toxoflavins (7-azapteridines) with 10% aqueous sodium hydroxide at 5-25 °C along with a benzilic acid type rearrangement, followed by decarboxylation and oxidation by air. Furthermore, heating the 6-azapurines in 10% ethanolic sodium hydroxides afforded the
- 本文描述了通过处理毒黄素可靠而简便地合成 6-氮杂嘌呤 (1,5-dimethyl-1H-imidazo[4,5-e][1,2,4]triazin-6(5H)-ones) (7-azapteridines) 与 10% 氢氧化钠水溶液在 5-25 °C 下进行苯甲酸型重排,然后通过空气进行脱羧和氧化。此外,在 10% 乙醇氢氧化钠中加热 6-氮杂嘌呤,得到相应的 1,2,4-三嗪-5,6(1H,4H)-二酮,这是由 6-氮杂嘌呤的咪唑环裂变引起的。