作者:Raffael C. Wende、Alexander Seitz、Dominik Niedek、Sören M. M. Schuler、Christine Hofmann、Jonathan Becker、Peter R. Schreiner
DOI:10.1002/anie.201509863
日期:2016.2.18
report the development of the first enantioselective Dakin–West reaction, yielding α‐acetamido methylketones with up to 58 % ee with good yields. Two of the obtained products were recrystallized once to achieve up to 84 % ee. The employed methylimidazole‐containing oligopeptides catalyze both the acetylation of the azlactone intermediate and the terminal enantioselective decarboxylative protonation. We
在这里,我们报道了第一个对映选择性达金-韦斯特反应的进展,该反应可产生ee高达58%ee的α-乙酰氨基甲基酮,并具有良好的收率。将获得的两种产品重结晶一次,以达到84%ee。所使用的含甲基咪唑的寡肽既催化the内酯中间体的乙酰化反应,又催化末端对映选择性脱羧质子化反应。我们提出了一种分散控制的反应路径,该路径确定了脱羧后中间烯醇化物的不对称质子化。