[EN] SUBSTITUTED TETRAHYDROISOQUINOLINE COMPOUNDS AS FACTOR XIA INHIBITORS [FR] COMPOSÉS TÉTRAHYDROISOQUINOLINES SUBSTITUÉS EN TANT QU'INHIBITEURS DU FACTEUR XIA
Multicomponent Synthesis of Tetrahydroisoquinolines
作者:Linwei Zeng、Bo Huang、Yangyong Shen、Sunliang Cui
DOI:10.1021/acs.orglett.8b01159
日期:2018.6.15
A multicomponentsynthesis of tetrahydroisoquinolines from carboxylic acids, alkynyl ethers, and dihydroisoquinolines is described. This process features readily available starting materials, simple experimental procedures for achievement of molecule complexity, and structural diversity. The preliminary control experiment and crossover reaction provide important insight into the reaction mechanism
omnipresent in biologically active molecules. Here we report on the direct asymmetric synthesis of these valuable compounds via the reaction of 3,4-dihydroisoquinolinium tetraarylborates. The dualroles of anionic tetraarylborates, which function as both prenucleophiles and stabilizers of 3,4-dihydroisoquinolinium cations, enable this rhodium(I)-catalyzed protocol to convergently provide enantioenriched 1-aryl
Intermolecular Regio‐ and Stereoselective Hetero‐[5+2] Cycloaddition of Oxidopyrylium Ylides and Cyclic Imines
作者:Changgui Zhao、Daniel A. Glazier、Daoshan Yang、Dan Yin、IIia A. Guzei、Michael M. Aristov、Peng Liu、Weiping Tang
DOI:10.1002/anie.201811896
日期:2019.1.14
We have developed the first intermolecular hetero‐[5+2] cycloaddition reaction between oxidopyrylium ylides and cyclic imines with excellent control of regio‐ and stereoselectivity. Surprisingly, divergent stereochemistry was observed depending on the substitution pattern of the oxidopyrylium ylide. This new reaction provides quick access to highly substituted nitrogen‐containing seven‐membered rings—azepanes
Formal [3 + 2] cycloaddition of azomethine ylides generated
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<i>in situ</i>
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with unactivated cyclic imines: A facile approach to tricyclic imidazolines derivatives
A simple and efficientmethod for the synthesis of tricyclic imidazolines derivatives via [3 + 2] 1,3‐dipolar cycloaddition between nonstabilized azomethine ylide generated in situ with unactivated cyclicimines is reported here. The method provided easy and mild access to various fused tricyclic hexahydroimidazo[5,1‐a]isoquinolines in excellent yields (up to 96%). This protocol is simple and easy
在此报道了一种简单有效的方法,该方法通过在未活化的环状亚胺中原位生成的不稳定的甲亚胺基立德之间[3 + 2] 1,3-偶极环加成反应合成三环咪唑啉衍生物。该方法可轻松温和地获得各种稠合三环六氢咪唑并[5,1- a ]异喹啉,收率极高(高达96%)。该协议简单易用。