Similarly, using diketene to replace mixed anhydride or acid chloride, intermediate enol 5 May be obtained.
而由混合酸酐或双烯酮代替酰氯，中间体也可能是烯酮或烯醇5。
Chiral imine 1 derived from (r) glyceraldehyde acetonide could rapidly react with ketenes 2 which was converted from mixed anhydride or acid chloride under mild conditions.
由(R) -丙叉甘油醛得到的手性亚胺1能与烯酮2在温和条件下迅速反应。
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