TPPH2/TBACl‐catalyzed (TPPH2=dianion of tetraphenyl porphyrin; TBACl=tetrabutyl ammonium chloride) carbon dioxide cycloaddition to N‐aryl aziridines was successful in synthesizing N‐aryl oxazolidin‐2‐ones. A catalytic tandem reaction was also developed, in which N‐aryl aziridines were initially synthesized and then reacted with carbon dioxide without being purified. The procedure occurred with a very
The catalytic system ‘Rhodamine B/additive’ for the chemical fixation of CO2
作者:Feng-tian Wu、Ling Wu、Chun-na Cui
DOI:10.1016/j.tet.2021.131965
日期:2021.3
The catalytic system ‘RhodamineB/additive’ was introduced to promote the CO2 reactions. We synthesized various cyclic carbonates in good to excellent yields under the catalysis of rhodamineB and TBAB. A variety of 2-oxazolidinone derivatives were obtained in the presence of rhodamineB and DBU.
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 Catalysed by Aluminium Heteroscorpionate Complexes
作者:José A. Castro-Osma、Amy Earlam、Agustín Lara-Sánchez、Antonio Otero、Michael North
DOI:10.1002/cctc.201600407
日期:2016.6.21
of an aluminium(heteroscorpionate) complex and tetrabutylammonium bromide acts as a highly efficient catalyst system for the synthesis of oxazolidinonesfromepoxides and isocyanates. Twenty two complexes were tested derived from a range of bispyrazole ligands and containing 1–3 aluminium atoms per complex. The optimal catalyst was found to be a bimetallic complex of a thioacetamidate ligand. Under