Yb(OTf)<sub>3</sub> catalyzed [3 + 2] annulations of D–A cyclopropanes with β-oxodithioesters: a regioselective synthesis of tetrahydrothiophenes
作者:Shu-Wen Wang、Wei-Si Guo、Li-Rong Wen、Ming Li
DOI:10.1039/c5ra06355h
日期:——
An efficient approach to synthesis tetrahydrothiophenes was developed through the reaction of β-oxodithioesters and D–A cyclopropanes catalyzed by Yb(OTf)3. This methodology was highly regioselective.
A new general method for the synthesis of thiophenes through acid mediated cyclization of mixed acetals derived from β-oxodithiates and bromoacetaldehyde acetal
presence of anhydrous potassium carbonate in dimethyl formamide at 80 °C to yield the corresponding mixed acetals. These acetals undergo smooth cyclization in the presence of ethanolic orthophosphoric acid to afford the corresponding 2-methylthio-3-acyl/aroyl/heteroaroyl thiophenes in 64–85% high overall yields.
Dual Roles of β-Oxodithioesters in the Copper-Catalyzed Synthesis of Benzo[<i>e</i>]pyrazolo[1,5-<i>c</i>][1,3]thiazine Derivatives
作者:Li-Rong Wen、Wen-Kui Yuan、Ming Li
DOI:10.1021/acs.joc.5b00288
日期:2015.5.15
A facile and efficient method for the chemoselective synthesis of benzo[e]pyrazolo[1,5-c][1,3]thiazine derivatives has been developed by tandem Ullmann coupling reactions of β-oxodithioesters (ODEs) with 3-(2-bromoaryl)-1H-pyrazoles in C–S bond formation manner, in which ODEs play dual roles as both a substrate and a ligand. A series of benzo[e]pyrazolo[1,5-c][1,3]thiazine derivatives were provided
通过β-氧二硫代酯(ODEs)与3-(2-)的串联乌尔曼偶联反应,已经开发出一种简便高效的化学选择性合成苯并[ e ]吡唑并[1,5- c ] [1,3]噻嗪衍生物的方法。溴芳基)-1 H-吡唑以C–S键形成方式,其中ODE既充当底物又充当配体。在NaOH的存在下,在80°C的CH 3 CN中,以CuI为铜源,以良好的收率提供了一系列苯并[ e ]吡唑并[1,5- c ] [1,3]噻嗪衍生物。N 2气氛。
Solvent-free and efficient synthesis of imidazo[1,2-a]pyridine derivatives via a one-pot three-component reaction
作者:Li-Rong Wen、Zhao-Rui Li、Ming Li、Han Cao
DOI:10.1039/c2gc16388h
日期:——
regioselective synthesis of imidazo[1,2-a]pyridinederivatives has been developed by annulation of heterocyclic ketene aminals (HKAs) and β-oxodithioesters (ODEs) as building blocks with aldehydes under solvent-free conditions using Et3N as the catalyst. The present green synthesis shows fascinating properties such as high regioselectivity, concise one-pot methodology, short reaction times, easy purification
通过杂环杂环化开发了一种绿色高效的咪唑并[1,2- a ]吡啶衍生物的区域选择性合成方法烯酮 阿米那犬 (HKAs)和β-氧二硫代酯(ODE)作为构建基, 醛类 在下面 溶剂-Et 3 N作为自由条件催化剂。目前的绿色合成显示出令人着迷的特性,例如高区域选择性,简洁的一锅法,反应时间短,易于操作纯化并且避免使用过渡金属。该方法学提供了另一种方法,可轻松以高收率轻松获得高度取代的咪唑并[1,2- a ]吡啶。
Synthesis of thiophene derivatives through InCl3-catalyzed cyclization of β-oxodithioesters with vinyl azides
作者:Li-Ming Zhang、Li-Rong Wen、Xing Xin、Ming Li
DOI:10.1016/j.tetlet.2023.154463
日期:2023.3
A rapid and facile protocol for the synthesis of diverse thiophenederivatives via cyclization reaction of β-oxodithioesters and vinyl azides was established. This protocol is highly efficient and affording diverse β-oxodithioesters and vinyl azides in moderate to good yields.