Stereoselective Syntheses of Conjugated 1-Phenylthio-1,3-alkadienes and 1,3,5-Alkatrienes through the Palladium-Catalyzed Cross-Coupling Reaction of (<i>E</i>)- or (<i>Z</i>)-1-Alkenylboronates with (<i>E</i>)- or (<i>Z</i>)-2-Bromo-1-phenylthio-1-alkenes
作者:Tatsuo Ishiyama、Norio Miyaura、Akira Suzuki
DOI:10.1246/cl.1987.25
日期:1987.1.5
1-Phenylthio-1,3-alkadienes and 1,3,5-alkatrienes are obtained in excellent yields stereo- and regioselectively by the cross-coupling between 1-alkenyl or 1,3-alkadienyl-1,3,2-benzodioxaboroles and (E)- or (Z)-2-bromo-1-phenylthio-1-alkenes in the presence of a catalytic amount of Pd(PPh3)4. These sulfides are converted to the corresponding conjugated alkatrienes and tetraenes by the reaction with Grignard
通过 1-链烯基或 1,3-链二烯基-1,3,2-苯并二氧杂环戊烷和(E)- 或 (Z)-2-bromo-1-phenylthio-1- 烯烃在催化量的 Pd(PPh3)4 存在下。这些硫化物在镍催化剂存在下通过与格氏试剂反应转化为相应的共轭烷三烯和四烯。