One-Pot Desymmetrization of<i>meso</i>-1,2-Hydrocarbon Diols through Acylation and Oxidation
作者:Christian E. Müller、Daniela Zell、Peter R. Schreiner
DOI:10.1002/chem.200901711
日期:2009.9.28
Avoid racemization! Short lipophilic oligopeptides utilizing nucleophilic N‐π‐methyl histidine residues catalyze the desymmetrization of meso‐1,2‐diols with enantiomeric ratios of up to 94:6. Direct one‐pot oxidation, which avoids the well‐known racemization of the monoacylated product, directly leads to α‐acetoxy ketones with enantiomeric ratios of up to 97:3 and 97 % yield.
避免消旋!利用亲核性N -π-甲基组氨酸残基的短亲脂性寡肽催化对映体比率高达94:6的内消旋1,2-二醇脱对称化。直接一锅氧化避免了单酰化产物的众所周知的外消旋化作用,直接导致对映体比率高达97:3且产率为97%的α-乙酰氧基酮。