Strecker-type reaction of nitrones using acetone cyanohydrin as a cyanide source was developed. By treating nitrones with acetone cyanohydrin in the presence of n-BuMgCl, transcyanation from the cyanohydrin to the nitrones smoothly proceeded in THF at 35 °C. The amount of n-BuMgCl could be reduced to 0.2 equiv to give the corresponding α-cyanohydroxylamines in up to 98% yields.
                                    利用
丙酮氰醇作为
氰源,开发了硝基膦的 Strecker 型反应。在
正丁基氯化镁存在下,用
丙酮氰醇处理硝化物,
氰醇到硝化物的反
氰化反应在 35 ℃ 的 THF 中顺利进行。n-BuMgCl 的用量可降至 0.2 等量,从而得到相应的 α-
氰基
羟胺,产率高达 98%。