Palladium-Catalyzed Cross-Coupling of Aryl Chlorides and Tosylates with Hydrazine
作者:Rylan J. Lundgren、Mark Stradiotto
DOI:10.1002/anie.201003764
日期:2010.11.8
Hydrazine is not a problem anymore: The title transformation is the first reaction to yield aryl hydrazines through the cross‐coupling of aryl chlorides and tosylates with hydrazine. An appropriately designed palladium catalyst allows this reaction to proceed rapidly under mild conditions, and with excellent chemoselectivity (see scheme; Ad=adamantyl, Ts=4‐toluenesulfonyl).
肼不再是问题:标题转化是通过芳基氯化物和甲苯磺酸与甲苯磺酸酯的交叉偶联反应生成芳基肼的第一个反应。适当设计的钯催化剂可使该反应在温和条件下快速进行,并具有出色的化学选择性(参见方案; Ad =金刚烷基,Ts = 4-甲苯磺酰基)。
Convenient semihydrogenation of azoarenes to hydrazoarenes using H<sub>2</sub>
作者:Manoj K. Sahoo、Ganesan Sivakumar、Sanjay Jadhav、Samrin Shaikh、Ekambaram Balaraman
DOI:10.1039/d1ob00850a
日期:——
The high atom-economical and eco-benign nature of hydrogenation reactions make them much more superior to conventional reduction and transferhydrogenation. Herein, a convenient and highly selective hydrogenation reaction of azoarenes using molecular hydrogen to access diverse hydrazoarenes is reported. The present catalytic method is general and operationally simple, and it operates under exceedingly