作者:Qi Chen、Ping Lan、Shen Tan、Martin G. Banwell
DOI:10.1021/acs.orglett.2c04099
日期:2023.1.20
A range of mono- and disaccharides, including glucose derivative 10, has been cleanly coupled, in the presence of a Pd catalyst, with various halogenated and structurally distinctive tropones, including “parent” compound 11, to afford the corresponding α- and β-anomeric forms of the tropolone glycosides, e.g., 12 and 13, respectively. Varying the ligand used influences the anomer distribution significantly
一系列单糖和双糖,包括葡萄糖衍生物10,在 Pd 催化剂存在下,与各种卤化和结构独特的托酮(包括“母体”化合物11 )干净地偶联,得到相应的 α- 和 β-异头形式的托酚酮糖苷,例如分别为12和13。改变所使用的配体会显着影响端基异构体分布,从而使 α- 或 β- 形式占主导地位。当使用二卤化类肌酸素作为偶联伙伴时,观察到显着的化学选择性和区域选择性。