氧杂环丁烷是药物相关合成中的多功能构建基块,可诱导性能调节作用。尽管相关的氧杂环丁烷广泛用于与二氧化碳(CO 2)偶联的化学反应中,以提供增值的商品化学品,但是尽管这些四元杂环的合成取得了新进展,但氧杂环丁烷/ CO 2的偶联仍然极为有限。在这里,我们报告了一种有效的单锅三组分反应(3CR)策略,用于偶联(取代的)氧杂环丁烷,胺和CO 2可以提供具有出色的化学选择性和高收率的各种功能化氨基甲酸酯。该过程由铝基催化剂在相对温和的条件下介导,并且已开发的催化方法可用于两种药学上相关的氨基甲酸酯的正式合成,其中3CR是关键步骤。
A series of sodium and aluminum atrane complexes of Na3L(THF)(5) (1), [AlLMe][Na4L(THF)(6)] (2), AlL(THF) (3), AlNaLMe(THF)(2) (4), and AlNaLOBn(THF)(2) (5), wherein L = tris(2-oxy-4,6-di-tert-butyl-benzyl)amine, were synthesized and characterized by NMR, X-ray crystallography, and elemental analysis. The trinuclear sodium atrane complex of Na3L(THF)(5) (1) is labile at room temperature; however, the tetranuclear sodium atrane cation in complex 2 can be stabilized by a multimetallic synergetic effect due to a firm interaction ring of -[Na-O-benzene](3)-. Complex 2 is also the first example of a sodatrane and alumatrane ion-paired complex in which both the cationic and anionic moieties contain an atrane ligand.