4-Hydroxymethyl-substituted oxazolidinone synthesis by tetraarylphosphonium salt-catalyzed reactions of glycidols with isocyanates
作者:Yasunori Toda、Shoya Tanaka、Shuto Gomyou、Ayaka Kikuchi、Hiroyuki Suga
DOI:10.1039/c9cc01983a
日期:——
optically active ones, in which tetraarylphosphonium salts catalyze the reaction of glycidol with isocyanates effectively, is described. The neutral catalysis facilitates glycidol addition to isocyanates followed by intramolecular cyclization. Mechanistic studies suggest that hydrogen-bonding interactions with the catalyst play an important role in the reaction progress.
Vanadium<sup>V</sup>(salen) catalysed synthesis of oxazolidinones from epoxides and isocyanates
作者:Christopher Beattie、Michael North
DOI:10.1039/c4ra04427d
日期:——
vanadiumV(salen) complex V+O(salen) EtOSO3− and tetrabutylammonium bromide forms a highly active catalyst system for the reaction between epoxides and isocyanates leading to oxazolidinones. The reaction conditions were optimized and the optimal conditions (80 °C in toluene for 5 hours with 2 mol% of vanadium catalyst and 2 mol% of tetrabutylammonium bromide cocatalyst) applied to eight epoxides and six aromatic
Bimetallic Aluminum(salen) Catalyzed Synthesis of Oxazolidinones from Epoxides and Isocyanates
作者:Thilo Baronsky、Christopher Beattie、Ross W. Harrington、Reyhan Irfan、Michael North、Javier G. Osende、Carl Young
DOI:10.1021/cs4001046
日期:2013.4.5
aluminum(salen) complex [Al(salen)]2O is shown to catalyze the synthesis of oxazolidinonesfromepoxides and isocyanates. The reaction is demonstrated to proceed with overall retention of epoxide stereochemistry, and both aromatic and aliphatic isocyanates can be used as substrates. In contrast to the corresponding reactions between epoxides and carbon dioxide or carbon disulfide which are also catalyzed by [Al(salen)]2O
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
Synthesis of multifunctional 4-hydroxymethyl 2-oxazolidinones from glycidyl carbamate derivatives catalyzed by bicyclic guanidine
作者:Yoshiaki Yoshida、Takeshi Endo
DOI:10.1016/j.tetlet.2021.153086
日期:2021.5
4-Hydroxymethyl 2-oxazolidinones have been successfully synthesized under mild conditions by the intramolecular cyclization of glycidyl carbamate derivatives with a bicyclicguanidine as the efficient catalyst. This reaction system, which is also applicable to the multifunctional compounds, can provide bi- and tri-functional alcohols having oxazolidinone moieties.