1,4-Diazabicyclo[2.2.2]octane (DABCO)-catalysed hydrolysis and alcoholysis reactions of 2-amino-9-benzyl-6-chloro-9H-purine
作者:James A. Linn、Ed W. McLean、James L. Kelley
DOI:10.1039/c39940000913
日期:——
2-Amino-9-benzyl-6-chloro-9H-purine 1 is hydrolysed in refluxing water in the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO) to give 2-amino-9-benzyl-1,6-dihydro-6-oxo-9H-purine 3; however, 1 reacts with hydroxide ion at ambient temp., or analcohol and potassium carbonate at elevated temperatures, in the presence of DABCO togive 3 or 6-alkoxy-2-amino-9-benzyl-9H-purines 4–8, respectively.
2-氨基-9-苄基-6-氯-9H-嘌呤 1 在 1,4-二氮杂双环[2.2.2]辛烷 (DABCO) 存在下在回流水中水解,得到 2-氨基-9-苄基-1 ,6-二氢-6-氧代-9H-嘌呤3;然而,在 DABCO 存在下,1 在环境温度下与氢氧根离子反应,或在高温下与醇和碳酸钾反应,分别生成 3 或 6-烷氧基-2-氨基-9-苄基-9H-嘌呤 4-8。