The chemoselective [4+2] vs. [2+2] cycloaddition between allenoates and dithioesters has been developed on the basis of switching the nucleophilic amine catalyst, offering a divergent synthesis of sulfur-containing heterocycles.
已开发出基于切换亲核胺催化剂的烯酸酯和二硫酯之间的化学选择性[4+2] vs. [2+2]环加成反应,提供了含硫杂环化合物的分岔合成。