are contradictory and partly in conflict with the Sharpless mnemonic. We systematically screened the SAD of esters and amides of angelic, tiglic, and methacrylic acid. Enantiocontrol arose in 14 of the 15 reactions, culminating at 99 % ee for the Weinreb amide of tiglic acid. The absolute configurations of all the nonracemic products were established by (stereo)chemical correlations. Without exception
关于
当归酸异丁酯的 Sharpless 不对称二羟基化 (
SAD) 面部选择性的文献发现是矛盾的,部分与 Sharpless 助记符相冲突。我们系统地筛选了当归、tiglic 和
甲基丙烯酸的酯和酰胺的
SAD。在 15 个反应中的 14 个反应中出现了对映体控制,在 tiglic acid 的 Weinreb 酰胺的 ee 达到 99% 时达到顶峰。所有非外消旋产物的绝对构型都是通过(立体)
化学相关性建立的。无一例外,它们都符合 Sharpless 助记符。