Directed, Nickel-Catalyzed Umpolung 1,2-Carboamination of Alkenyl Carbonyl Compounds
作者:Vincent A. van der Puyl、Joseph Derosa、Keary M. Engle
DOI:10.1021/acscatal.8b04516
日期:2019.1.4
2-carboamination of nonconjugated alkenyl carbonyl compounds with O-benzoyl hydroxylamine (N–O) electrophiles and aryl/alkylzinc nucleophiles to afford β- and γ-amino acid derivatives. This method enables preparation of products containing structurally diverse tertiary amine motifs, including heterocycles, and can also be used to form quaternary carbon centers. The reaction takes advantage of a tethered 8-aminoquinoline
Copper-Catalyzed Diastereo- and Enantioselective Desymmetrization of Cyclopropenes: Synthesis of Cyclopropylboronates
作者:Alejandro Parra、Laura Amenós、Manuel Guisán-Ceinos、Aurora López、José Luis García Ruano、Mariola Tortosa
DOI:10.1021/ja510419z
日期:2014.11.12
A novel Cu-catalyzed diastereo- and enantioselective desymmetrization of cyclopropenes to afford nonracemic cyclopropylboronates is described. Trapping the cyclopropylcopper intermediate with electrophilic amines allows for the synthesis of cyclopropylaminoboronic esters and demonstrates the potential of the approach for the synthesis of functionalized cyclopropanes.
描述了一种新型的 Cu 催化的环丙烯的非对映选择性和对映选择性去对称化,以提供非外消旋的环丙基硼酸酯。用亲电胺捕获环丙基铜中间体可以合成环丙基氨基硼酸酯,并展示了该方法合成功能化环丙烷的潜力。
Multicomponent Cyclopropane Synthesis Enabled by Cu-Catalyzed Cyclopropene Carbometalation with Organoboron Reagent: Enantioselective Modular Access to Polysubstituted 2-Arylcyclopropylamines
cyclopropane synthesis, as exemplified by the modular assembly of the highly medicinally relevant 2-arylcyclopropylamine (ACPA) framework via stereoselective carboamination. The highly enantioselective version has been realized to afford enantioenriched ACPAs with up to all three cyclopropyl carbons as stererogenic centers in one operation, representing the first example of enantioselective multicomponent
A Cu-based chiral catalyst enables convergent, highly enantioselective three-component assembly of alkenyl cyclopropylamines containing up to all three stereogenic centers.