Acetic acid-catalyzed diketopiperazine synthesis.
作者:KENJI SUZUKI、YUSUKE SASAKI、NOBUYOSHI ENDO、YUICHI MIHARA
DOI:10.1248/cpb.29.233
日期:——
Optically pure diketopiperazines were obtained in good yields when dipeptide esters were refluxed in 2-butanol containing 0.1 M acetic acid for 3 hours. When prolyl-amino acid ester was used as the starting material, 1 to 2 M acetic acid was the most effective concentration.
当二肽酯在含有0.1 M醋酸的2-丁醇中回流3小时时,得到了光学纯的二酮哌嗪,产率良好。当使用脯氨酰氨基酸酯作为起始材料时,1至2 M醋酸是最有效的浓度。