Difluoromethyl phenoxathiinium salt: A new general and versatile difluoromethylating reagent with divergent ·CF2H, CF2H+, and:CF2 reactivities
作者:Yuan-Qing Gu、Hong-Xin Long、Dan-Dan Zhang、Mei-Feng Ruan、Guo-Kai Liu
DOI:10.1007/s11426-023-1862-x
日期:2024.3
versatile electrophilic difluoromethylating reagent is still a grand challenge so far due to its inherent instability or low reactivity. Herein, we report the design and synthesis of difluoromethyl phenoxathiinium tetrafluoroborate (PT-CF2H+BF4−) as a novel difluoromethylating reagent, which proves to be a bench-stable, general, powerful and versatile reagent with divergent ·CF2H, CF2H+, and:CF2 reactivities
摘要 由于其固有的不稳定性或低反应性,开发实用且多功能的亲电二氟甲基化试剂迄今为止仍然是一个巨大的挑战。在此,我们报道了二氟甲基吩噻噻鎓四氟硼酸盐(PT-CF 2 H + BF 4 -)作为一种新型二氟甲基化试剂的设计和合成,该试剂被证明是一种稳定的、通用的、强大的和多功能的试剂,具有发散·CF 2 H 、CF 2 H +和:CF 2反应性。利用该试剂,我们通过不同的途径展示了大量的二氟甲基自由基转移反应,包括无光催化剂的可见光诱导、可见光光氧化还原催化和可见光介导 EDA 复合物的单电子转移。此外,绿色高效的CF 2 H +和:CF 2转移反应也很容易完成。