Oxidation of the title N-aminoquinazolone (2) in dichloromethane in the presence of α-methylene-γ-butyrolactone gave a 1 : 1 : 3 ratio of stereoisomers (3): if the oxidation is carried out in the presence of a small quantity of trifluoroacetic acid (TFA), only one of these stereoisomers in produced in 72% yield.
在α-亚甲基-
γ-丁内酯存在下,
二氯甲烷中标题N-
氨基
喹唑酮(2)的氧化产生立体异构体(3)的比例为1:1:3 :如果在少量存在下进行氧化如果使用
三氟乙酸(TFA),则仅产生这些立体异构体中的一种,产率为72%。