Pd(II)-Catalyzed Cascade Wacker−Heck Reaction: Chemoselective Coupling of Two Electron-Deficient Reactants
作者:Franck Silva、Maud Reiter、Rebecca Mills-Webb、Marcin Sawicki、Daniel Klär、Nicolas Bensel、Alain Wagner、Véronique Gouverneur
DOI:10.1021/jo061292a
日期:2006.10.1
acrylate, two electron-deficient reactants. With β-hydroxy ynones, this cascade Wacker−Heck process gave access to highly functionalized tri- or tetrasubstituted dihydropyranones featuring an unusual dienic system. For diastereomerically pure and for enantioenriched β-hydroxyynones, these reactions proceed without affecting the stereochemical integrity of the existing stereocenters. In addition, tetrasubstituted
开发了一种新颖的钯(II)催化的氧羰基钯化工艺,该工艺允许羟基炔酮与丙烯酸乙酯(两种电子不足的反应物)进行精心策划的结合。借助β-羟基炔酮,这种级联的Wacker-Heck工艺可以获得具有独特二烯体系的高度官能化的三或四取代的二氢吡喃酮。对于非对映体纯的和对映体富集的β-羟基炔酮,进行这些反应时不会影响现有立体中心的立体化学完整性。另外,当使用α-羟基炔酮和丙烯酸乙酯作为起始原料时,可以制备四取代的呋喃酮。环化后获得的二氢吡喃酮和呋喃酮是新颖的化合物,