Preparation of vinyl ethers using a Wittig approach, and their subsequent hydrogenation employing continuous-flow processing
作者:Monaem Balti、Mohamed Lotfi Efrit、Nicholas E. Leadbeater
DOI:10.1016/j.tetlet.2016.03.037
日期:2016.4
A methodology is reported for the preparation of various aromatic-functionalized vinylethers using a Wittig approach. The subsequent hydrogenation of the vinylether products to their saturated analogs is also performed and is streamlined by employing continuous-flow processing.
Preparation of quinolines from resin-bound esters using titanium reagents
作者:Calum Macleod、Carolyn A. Austin、Dieter W. Hamprecht、Richard C. Hartley
DOI:10.1016/j.tetlet.2004.09.170
日期:2004.11
homobenzylic thioacetals are prepared from ortho-nitrobenzaldehydes via homologation using an alpha-methoxy Wittig reagent. Titanium reagents are generated from the 1,3-dithianes using a low valent titanium reagent and are then used to alkylidenate resin-bound esters. An N-silylated Boc group protects the ortho-amino functionality. Traceless SPS of quinolines is completed by treating the resulting
Synthesis of deoxybenzoins from β-alkoxy styrenes and arylboronic acids via palladium-catalyzed regioselective Heck-arylation reactions
作者:Rapelly Venkatesh、Aswathi C. Narayan、Jeyakumar Kandasamy
DOI:10.1039/d4ob00616j
日期:——
Palladium-catalyzed synthesis of deoxybenzoin derivatives from styryl ethers and arylboronicacids is reported. The reaction proceeds under mild conditions in the presence of TEMPO and provides the desired products in good to excellent yields. Simple operation, broad substrate scope, and functional group tolerance are the salient features of the developed methodology.
据报道,钯催化从苯乙烯醚和芳基硼酸合成脱氧安息香衍生物。该反应在 TEMPO 存在下在温和条件下进行,并以良好至优异的产率提供所需产物。操作简单、底物范围广泛和官能团耐受性是所开发方法的显着特征。
Microwave-assisted in situ deprotection and ω-methoxylation of TMS-protected aryl alkynes
作者:Jenny Wettergren、Alexander B.E. Minidis
DOI:10.1016/j.tetlet.2003.08.059
日期:2003.10
Using microwave technology, rapid omega-methoxylation of aryl alkynes is possible. (C) 2003 Elsevier Ltd. All rights reserved.