开发了FeCl 3催化的烯丙基克莱森重排/区域和化学选择性好氧脱氢环化多米诺反应,提供了范围广泛的2-芳基/烷基,3-(取代乙烯基)萘[2,1- b ]呋喃在95–130°C下以原子经济和阶梯经济的方式收率。机理研究表明,FeCl 3催化剂负责反应中的高区域选择性和化学选择性。发射蓝色的产物的量子产率为0.95。该反应易于以克规模进行,并且还证明了产物的合成应用。
开发了FeCl 3催化的烯丙基克莱森重排/区域和化学选择性好氧脱氢环化多米诺反应,提供了范围广泛的2-芳基/烷基,3-(取代乙烯基)萘[2,1- b ]呋喃在95–130°C下以原子经济和阶梯经济的方式收率。机理研究表明,FeCl 3催化剂负责反应中的高区域选择性和化学选择性。发射蓝色的产物的量子产率为0.95。该反应易于以克规模进行,并且还证明了产物的合成应用。
Cascade Reaction of Propargyl Amines with AgSCF<sub>3</sub>, as Well as One-Pot Reaction of Propargyl Amines, AgSCF<sub>3</sub>, and Di-<i>tert</i>-butyl Peroxide: Access to Allenyl Thiocyanates and Allenyl Trifluoromethylthioethers
An efficient cascade reaction of propargyl amines with AgSCF3 and KBr is developed, affording allenyl thiocyanates at room temperature in high yields. This transformation proceeds via the in situ formation of isothiocyanate intermediates, followed by a [3,3]-sigmatropic rearrangement. The resulting allenyl thiocyanates bearing 3-(electro-donating phenyl) substitutions without isolation can then be
readily synthesized by electrophiliccarbocyclization of aryl propargylic alcohols in moderate to good yields under mild conditions. The resulting diiodide can be further exploited by subsequent oxidizing and coupling reactions. Both the iodine anion and cation generated from I2 are used effectively. The presence of a trace amount of water is essential for this electrophilic cyclization.