(3R,3'S)-3-[(tritylthio)methyl]spiro[dihydropyrazine-2,5-dione-6,3'-(2',3'-dihydrothieno[2,3-b]naphtho-4',9'-dione)] 在
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
以82%的产率得到(3R,3'S)-3-(mercaptomethyl)spiro[(dihydropyrazine-2,5-dione)-6,3'-(2',3'-dihydrothieno[2,3-b]naphtho-4',9'-dione)]