Transition-Metal-Free Cross-Coupling of Aryl and <i>N</i>-Heteroaryl Cyanides with Benzylic Zinc Reagents
作者:Pauline Quinio、Daniela Sustac Roman、Thierry León、Sharankini William、Konstantin Karaghiosoff、Paul Knochel
DOI:10.1021/acs.orglett.5b02380
日期:2015.9.4
Functionalized 4-benzylated pyridines can be efficiently prepared by a transition-metal-free cross-coupling between various benzylic zinc chlorides and substituted 4-cyanopyridines in THF/DMPU under microwave irradiation (40 °C, 0.5–1.5 h). Selective benzylations on polycyano-aromatics have also been achieved under these mild conditions. We also report a novel oxidative nucleophilic substitution of
通过在微波辐射(40°C,0.5-1.5 h)下,各种苄基氯化锌与取代的4-氰基吡啶在THF / DMPU中的无过渡金属交叉偶联,可以有效地制备功能化的4-苄基吡啶。在这些温和的条件下,还可以实现多氰基芳族化合物的选择性苄基化。我们还报告了一种使用苄基锌试剂在1,3-二氰基苯上氢的新型氧化亲核取代反应。