Solution-Phase Parallel Synthesis of a Multisubstituted Cyclic Imidate Library
作者:Saurabh Mehta、Jesse P. Waldo、Benjamin Neuenswander、Gerald H. Lushington、Richard C. Larock
DOI:10.1021/co3001605
日期:2013.5.13
a diverse 71-member library of multisubstituted cyclic imidates is described. The key intermediates, 3-iodomethylene-containing cyclic imidates, are readily prepared in good to excellent yields by the palladium/copper-catalyzed cross-coupling of various o-iodobenzamides and terminal alkynes, followed by electrophilic cyclization with I2. These cyclic imidates were further functionalized by palladium-catalyzed
Competition Studies in Alkyne Electrophilic Cyclization Reactions
作者:Saurabh Mehta、Jesse P. Waldo、Richard C. Larock
DOI:10.1021/jo802196r
日期:2009.2.6
toward alkyneelectrophiliccyclizationreactions has been studied. The required diarylalkynes have been prepared by consecutive Sonogashira reactions of appropriately substituted aryl halides and competitive cyclizations have been performed using I2, ICl, NBS and PhSeCl as electrophiles. The results indicate that the nucleophilicity of the competing functional groups, polarization of the alkyne triple
已经研究了各种官能团对炔烃亲电环化反应的相对反应性。所需的二芳基炔已通过适当取代的芳基卤化物的连续 Sonogashira 反应制备,并使用 I 2、ICl、NBS 和 PhSeCl 作为亲电子试剂进行竞争性环化。结果表明,竞争官能团的亲核性、炔烃三键的极化和中间体的阳离子性质是决定这些反应结果的最重要因素。
TBAI-mediated regioselective 5-exo-dig iodinative oxocyclization of 2-alkynylbenzamides for the synthesis of isobenzofuran-1-imines and isobenzofurans
functionalization is an important transformation method for the synthesis of a wide variety of organic products. In this work, a regioselective TBAI-mediated oxidative 5-exo-dig iodo-oxycyclization of 2-alkynylbenzamide is used for the synthesis of various isobenzofuran derivatives with excellent functional group tolerance and high reaction efficiency. We hypothesized that using water in a mixed solvent could change
Regio- and Stereoselective Synthesis of Cyclic Imidates via Electrophilic Cyclization of 2-(1-Alkynyl)benzamides. A Correction
作者:Saurabh Mehta、Tuanli Yao、Richard C. Larock
DOI:10.1021/jo301958q
日期:2012.12.7
The electrophilic cyclization of 2-(1-alkynyl)benzamides affords high yields of cyclic imidates, instead of the previously reported isoindolin-1-ones, where cyclization proceeds on the oxygen of the carbonyl group rather than the nitrogen of the amide functionality. X-ray crystallography and spectroscopic techniques have been used to characterize the products. A correction is hereby provided in order