Copper-Catalyzed One-Pot Synthesis of <i>N</i>-Aryl Oxazolidinones from Amino Alcohol Carbamates
作者:William Mahy、Pawel K. Plucinski、Christopher G. Frost
DOI:10.1021/ol502322c
日期:2014.10.3
sequential intramolecular cyclization of aminoalcoholcarbamates followed by Cu-catalyzed cross-coupling with aryl iodides under mild conditions has been developed. The reaction occurred in good yields and tolerated aryl iodides containing functionalities such as nitriles, ketones, ethers, and halogens. Heteroaryl iodides and substituted aminoalcoholcarbamates were also well tolerated.
Transformation of Carbon Dioxide into Oxazolidinones and Cyclic Carbonates Catalyzed by Rare-Earth-Metal Phenolates
作者:Bin Xu、Peng Wang、Min Lv、Dan Yuan、Yingming Yao
DOI:10.1002/cctc.201600534
日期:2016.8.8
Rare‐earth‐metal complexes stabilized by amine‐bridged tri(phenolato) ligands were developed, and their activities in catalyzing transformations of CO2 were studied. A series of terminal epoxides and challenging disubstituted epoxides were converted into the respective cyclic carbonates in the presence of CO2 in yields of 58 to 96 %. In addition, these rare‐earth‐metal complexes also showed good activities
Carbon dioxide-based facile synthesis of cyclic carbamates from amino alcohols
作者:Teemu Niemi、Israel Fernández、Bethany Steadman、Jere K. Mannisto、Timo Repo
DOI:10.1039/c8cc00636a
日期:——
for the synthesis of cyclic carbamatesfromaminoalcohols and carbon dioxide in the presence of an external base and a hydroxyl group activating reagent. Utilizing p-toluenesulfonyl chloride (TsCl), the reaction proceeds under mild conditions, and the approach is fully applicable to the preparation of various high value-added 5- and 6-membered rings as well as bicyclic fused ring carbamates. DFT calculations
我们在本文中报道了在外部碱和羟基活化剂存在下由氨基醇和二氧化碳合成环状氨基甲酸酯的简单通用方法。利用对甲苯磺酰氯(TsCl),该反应在温和的条件下进行,该方法完全适用于制备各种高附加值的5-和6-元环以及双环稠合的氨基甲酸酯。DFT计算和实验结果表明具有高区域选择性,化学选择性和立体选择性的S N 2型反应机理。
Conversion of Carbon Dioxide into Oxazolidinones Mediated by Quaternary Ammonium Salts and DBU
作者:Min Lv、Peng Wang、Dan Yuan、Yingming Yao
DOI:10.1002/cctc.201700594
日期:2017.12.20
A straightforward method to construct oxazolidinones through a three‐component reaction involving CO2, epoxides, and amines promoted by a combination of Bu4NI and 1,8‐diazabicyclo[5.4.0]undec‐7‐ene was developed. A wide range of aromatic and aliphatic amines and monosubstituted epoxides were converted into 3,5‐disubstituted‐2‐oxazolidines in up to 95 % yield. This metal‐free and easily available catalytic
Synthesis of Oxazolidinones from Epoxides and Isocyanates Catalyzed by Rare-Earth-Metal Complexes
作者:Peng Wang、Jie Qin、Dan Yuan、Yaorong Wang、Yingming Yao
DOI:10.1002/cctc.201403015
日期:2015.4.7
Rare‐earth‐metal complexes stabilized by an amino‐bridged triphenolate ligand showed high efficiency in catalyzing the cycloaddition of isocyanates and epoxides in the presence of NBu4I under mild conditions. This strategy is applicable to both terminal and disubstituted epoxides as well as various isocyanates, and tolerated different types of functional groups. Moreover, it is highly regio‐ and stereoselective