A Simple, General, and Highly
Chemoselective Acetylation of Alcohols Using Ethyl Acetate as the
Acetyl Donor Catalyzed by a Tetranuclear Zinc Cluster
作者:Takashi Ohshima、Kazushi Mashima、Takanori Iwasaki、Yusuke Maegawa、Yukiko Hayashi
DOI:10.1055/s-0029-1217335
日期:——
presence of a Zn-cluster catalyst, alcohols are efficiently converted to the corresponding acetate just by refluxing in EtOAc. The mild reaction conditions enabled the reactions of various functionalized alcohols to proceed in good to excellent yield. Moreover, even when a large excess of the acetyl donor is used, the hydroxyl groups are selectively acetylated in the presence of highly nucleophilic aliphatic
在 Zn 簇催化剂的存在下,仅通过在 EtOAc 中回流,醇就可以有效地转化为相应的乙酸盐。温和的反应条件使各种官能化醇的反应能够以良好的收率进行。此外,即使使用大量过量的乙酰基供体,羟基在高度亲核脂肪族氨基的存在下也会被选择性乙酰化,接近酶系统的化学选择性。