Facile Unmasking of Ethenylated Isocytosines via Diacetoxylation with Load Tetraacetate.
作者:Magoichi SAKO、Reiko TOTANI、Kosaku HIROTA、Yoshifumi MAKI
DOI:10.1248/cpb.40.235
日期:——
Treatment of ethenylated isocytosines, imidazolo[1, 2-α]pyrimidine-5(1H)-one (2) and -7(8H)one (3), with lead tetraacetate (LTA) in glacial acetic acid followed by alkaline hydrolysis resulted in the smooth removal of the ethenyl group to give isocytosine (1) in high yields. The unmasking of 2 by LTA to 1 was compared with the results using iodosylbenzone diacetate and N-bromosuccinimide.
用四乙酸铅 (LTA) 在冰醋酸中处理乙烯基化异胞嘧啶、咪唑并[1, 2-α]嘧啶-5(1H)-一 (2) 和 -7(8H)一 (3),然后进行碱性水解,得到顺利去除乙烯基,以高产率得到异胞嘧啶 (1)。将 LTA 对 2 的解密结果与使用碘酰苯二乙酸酯和 N-溴代琥珀酰亚胺的结果进行了比较。