我们已经开发出了一种高效的合成路线,该路线是在空气(O 2)和K 2 S 2 O 8作为生态友好型氧化剂的情况下,通过使用苯硫酚通过AgNO 3催化的烯烃的氧磺酰化反应。硫酚在基于双氧活化的自由基工艺中首次被用作磺酰化前体。此外,该方案还提供了一种在不使用任何引发剂的情况下,在室温下合成β-羟基硫化物的新型便捷方法。
Rongaliteo (R) promotes cleavage of disulfides generating thiolate anions that then undergo facile ring opening of epoxides in the presence of K2CO3 to afford alpha-addition products 3 with good to excellent yields. The important features of this methodology are broad substrates scope, high yielding, reasonably rapid reaction rate, high regioselectivity and no requirement of metal catalysts. It should be noted that the thiolate anion attacks the epoxides derived from styrene to produce the corresponding alpha-addition products 3 with high regioselectivity, instead of the beta-addition regioisomer 4 that Could be formed from the attack of the nucleophile at the benzylic position. (C) 2009 Elsevier Ltd. All rights reserved.
Aerobic oxysulfonylation of alkenes using thiophenols: an efficient one-pot route to β-ketosulfones
作者:Atul K. Singh、Ruchi Chawla、Twinkle Keshari、Vinod K. Yadav、Lal Dhar S. Yadav
DOI:10.1039/c4ob00776j
日期:——
We have developed a highly efficient synthetic route to β-ketosulfones via AgNO3 catalyzed oxysulfonylation of alkenes using thiophenols in the presence of air (O2) and K2S2O8 as eco-friendly oxidants. Thiophenols have been used as sulfonylation precursors for the first time in a dioxygen activation based radical process. Moreover, the protocol also offers a new and convenient method for the synthesis
我们已经开发出了一种高效的合成路线,该路线是在空气(O 2)和K 2 S 2 O 8作为生态友好型氧化剂的情况下,通过使用苯硫酚通过AgNO 3催化的烯烃的氧磺酰化反应。硫酚在基于双氧活化的自由基工艺中首次被用作磺酰化前体。此外,该方案还提供了一种在不使用任何引发剂的情况下,在室温下合成β-羟基硫化物的新型便捷方法。