Novel Method for Incorporating the CHF<sub>2</sub> Group into Organic Molecules Using BrF<sub>3</sub>
作者:Revital Sasson、Aviv Hagooly、Shlomo Rozen
DOI:10.1021/ol034051n
日期:2003.3.1
3-dithiane derivatives, easily made from alkyl bromides and the parent 1,3-dithiane, were reacted with BrF(3) to form the corresponding 1,1-difluoromethyl alkanes (RCHF(2)) in 60-75% yield. The reaction proceeds well with primary alkyl halides. The limiting step for secondary alkyl halides is the relatively low yield of the dithiane preparation. The two sulfur atoms of the dithiane are essential for
由烷基溴和母体1,3-二噻吩容易制得的2-烷基-1,3-二噻烷衍生物与BrF(3)反应形成60中的相应1,1-二氟甲基烷烃(RCHF(2)) -75%的产率。该反应与伯烷基卤化物进行得很好。仲烷基卤化物的限制步骤是二噻烷制剂的相对较低的收率。二噻吩的两个硫原子对于反应是必不可少的。