An efficient regio- and diastereoselective cyclization of sulfamate-derived cyclic imines with unsubstituted or monosubstituted α-halo hydroxamates is developed under mild conditions. This reaction proceeds smoothly under transition-metal-free conditions via a domino aza-Mannich addition/intramolecular nucleophilic substitution sequence, providing a convenient route to access 2-monosubstituted and
在温和的条件下,开发了由
氨基磺酸衍生的环状
亚胺与未取代或单取代的α-卤代异羟
肟酸酯进行的高效区域和非对映选择性环化反应。该反应在无过渡
金属的条件下通过多米诺氮杂-曼尼希加成/分子内亲核取代序列顺利进行,为获得2-单取代和2,5-二取代的4-
咪唑啉酮提供了便利的途径。值得注意的是,产物是用单一反式异构体以中等至优异的产率获得的。