Copper-Catalyzed Difunctionalization of Allenes with Sulfonyl Iodides Leading to (<i>E</i>)-α-Iodomethyl Vinylsulfones
作者:Ning Lu、Zhiguo Zhang、Nana Ma、Conghui Wu、Guisheng Zhang、Qingfeng Liu、Tongxin Liu
DOI:10.1021/acs.orglett.8b01765
日期:2018.7.20
A highly regioselective iodosulfonylation of allenes in the presence of CuI and 1,10-phenanthroline has been developed for the synthesis of various useful (E)-α-iodomethyl vinylsulfones in moderate to excellent yields. This practical reaction is fast, operationally simple, and in particular, proceeds under very mild conditions to afford the target products with high regio- and stereoselectivity. The
Cu-Catalyzed Deoxygenative C2-Sulfonylation Reaction of Quinoline <i>N</i>-Oxides with Sodium Sulfinate
作者:Bingnan Du、Ping Qian、Yang Wang、Haibo Mei、Jianlin Han、Yi Pan
DOI:10.1021/acs.orglett.6b02289
日期:2016.8.19
An unexpected Cu-catalyzed deoxygenative C2-sulfonylation reaction of quinoline N-oxides in the presence of radical initiator K2S2O8 was developed that used sodium sulfinate as a sulfonyl coupling partner. The mechanism studies indicate that the reaction proceeds via Minisci-like radical coupling step to give sulfonylated quinoline with good chemical yields.
在自由基引发剂K 2 S 2 O 8的存在下,开发了出乎意料的Cu催化的喹啉N-氧化物的C2-磺酰化脱氧反应,该反应使用亚磺酸钠作为磺酰基偶联剂。机理研究表明,该反应通过类似Minisci的自由基偶联步骤进行,从而得到具有良好化学收率的磺酰化喹啉。
Transition-metal-free synthesis of vinyl sulfones via tandem cross-decarboxylative/coupling reactions of sodium sulfinates and cinnamic acids
A transition-metal-free synthesis of vinyl sulfones, utilizing sodium sulfinates and cinnamic acids through tandem cross-decarboxylative/coupling reactions, has been developed.
Efficient sulfonylation of ketones with sodium sulfinates for the synthesis of β-keto sulfones
作者:Siqi Deng、En Liang、Yinrong Wu、Xiaodong Tang
DOI:10.1016/j.tetlet.2018.09.049
日期:2018.10
The oxidative sulfonylation of ketones with sodium sulfinates as the sulfone source and DMSO as the oxidant is reported. A series of β-keto sulfones were obtained in good to excellent yields. The advantages of this efficient protocol include the low cost of DMSO and HBr, and a broad scope.