作者:Khokan Choudhuri、Tapas Kumar Achar、Prasenjit Mal
DOI:10.1002/adsc.201700772
日期:2017.10.25
iodine-triggered dioxygen activation in oxysulfonylation reactions of unactivated olefins using sulfonyl hydrazides and iodine as catalyst is reported here. In one pot, near quantitative syntheses of β-hydroxysulfones were achieved at 70 °C, within 7 h, in acetonitrile and under aerobic conditions. A plausible mechanism is established by radical trapping and 18O labelling experiments for the operationally simple
在此报道了使用磺酰肼和碘作为催化剂的未活化烯烃的氧磺酰化反应中的碘触发的双氧活化。在一个锅中,在乙腈中和有氧条件下,在70°C,7 h之内,即可完成近乎定量的β-羟基砜合成。通过自由基捕获和18 O标记实验建立了可行的机制,以实现操作简单,有效且经济上可行的转化。建议在无金属和温和条件下直接活化空气中的氧,以进行烯烃的氧磺酰化。