A novel visible-light-induced coupling–cyclization of ortho-alkynylaryl vinylethers with arylsulfonyl azides has been described. This transformation provided a concise approach to access C3-exocyclic C═C bond/C2-alkylsulfone-tethered benzofurans via a solvent-leveraged carbosulfonylation and [2 + 2 + 3] cyclization. Primary mechanistic studies demonstrated that THF belongs to a crucial H atom source
Asymmetric transfer hydrogenation of heterocycle-containing acetophenone derivatives using N-functionalised [(benzene)Ru(II)(TsDPEN)] complexes
作者:Jonathan Barrios-Rivera、Yingjian Xu、Guy J. Clarkson、Martin Wills
DOI:10.1016/j.tet.2021.132562
日期:2022.1
The application of enantiomerically-pure ruthenium(II) catalysts containing N - functionalised TsDPEN ligand to the asymmetric transferhydrogenation of 15 examples of α-heterocyclic acetophenone derivatives is reported. Products of up to 99% ee were formed.
报道了含有 N-官能化 TsDPEN 配体的对映体纯钌 (II) 催化剂在 15 个 α-杂环苯乙酮衍生物实例的不对称转移氢化中的应用。形成高达 99% ee 的产物。
<i>N</i>,<i>N</i>‘-Ditosylhydrazine: A Convenient Reagent for Facile Synthesis of Diazoacetates
作者:Tatsuya Toma、Jun Shimokawa、Tohru Fukuyama
DOI:10.1021/ol701432k
日期:2007.8.1
A novel entry to the synthesis of diazoacetates is disclosed. A variety of diazoacetates were synthesized from the corresponding bromoacetates by treatment with N,N'-ditosylhydrazine in moderate to high yields. Ease of operation with the stable crystalline reagent as well as a short reaction time offer a useful alternative to the conventional methods.
Enantioselective Nucleophilic β-Carbon-Atom Amination of Enals: Carbene-Catalyzed Formal [3+2] Reactions
作者:Xingxing Wu、Bin Liu、Yuexia Zhang、Martin Jeret、Honglin Wang、Pengcheng Zheng、Song Yang、Bao-An Song、Yonggui Robin Chi
DOI:10.1002/anie.201606571
日期:2016.9.26
enantioselective β‐carbon amination for enals is disclosed. The nitrogen atom from a protected hydrazine with suitable electronic properties readily behaves as a nucleophile. Addition of the nitrogen nucleophile to a catalytically generated N‐heterocyclic‐carbene‐bound α,β‐unsaturated acyl azolium intermediate constructs a new carbon–nitrogen bond asymmetrically. The pyrazolidinone products from our catalytic
ALCOHOL DERIVATIVES AS KV7 POTASSIUM CHANNEL OPENERS
申请人:H. Lundbeck A/S
公开号:US20210032196A1
公开(公告)日:2021-02-04
The present invention provides novel compounds which activate the Kv7 potassium channels. Separate aspects of the invention are directed to pharmaceutical compositions comprising said compounds and uses of the compounds to treat disorders responsive to the activation of Kv7 potassium channels.