naphthoquinonefuran derivatives from 2-hydroxynaphthoquinones has been developed. The sequentially accomplished process comprises an intermolecular alkynylation of sp2-carbon at the 3 position of 2-hydroxynaphthoquinones with arylethynyl bromides, followed by a base-promoted intramolecular nucleophilic annulation reaction. A broad range of functional groups is compatible with this reaction, and diverse naphtho[2
已经开发了一种无过渡金属的路线,用于从2-羟基萘醌串联一锅法合成萘醌呋喃衍生物。依次完成的方法包括在2-羟基萘醌的3位上的sp 2-碳的分子间炔基化与芳基乙炔基溴化物,然后进行碱促进的分子内亲核环化反应。广泛的官能团与该反应相容,并且可以以良好的产率和优异的区域选择性获得各种萘并[2,3 - b ]呋喃-4,9-二酮。
The iodine-mediated highly regioselective synthesis of angular and linear naphthofuroquinones
作者:Suyou Liu、Lijun Long、Duoduo Xie、Lijun Liu、Dayou Ma
DOI:10.1016/j.tetlet.2015.10.058
日期:2015.12
Naphthofuroquinones are of great value in medicinal chemistry. In this letter, a facile method for highly regioselective synthesis of both linear and angular naphthofuroquinones has been developed via iodine mediated cyclization of 2-hydroxy-3-substitutedvinyl-1,4-naphthoquinones under very mild conditions. (C) 2015 Elsevier Ltd. All rights reserved.
KANG, WEN-BING;SEKIYA, TAKASHI;TORU, TAKESHI;UENO, YOSHIO, J. CHEM. SOC. PERKIN TRANS. PT 1,(1990) N, C. 441-445
Fused Furan Moieties from Enol-like Compounds and β-Keto Sulfoxonium Ylides Involving sp<sup>2</sup> C–H Activation and Concomitant Tandem C–O Annulation
作者:Dwaipayan Das、Agniva Das、Saiful Islam、Asish R. Das、Adrita Banerjee、Romit Majumder、Debasish Bandyopadhyay