<i>N</i>-Heterocyclic Carbene Catalyzed Domino Cyclization of Propargylic Alcohols and Benzoyl Isocyanates
作者:Kyoung A Jo、Muchchintala Maheswara、Eunyoung Yoon、Yun Yeong Lee、Hoseop Yun、Eun Joo Kang
DOI:10.1021/jo202102y
日期:2012.3.16
N-Hetereocyclic carbenes (NHCs) were found to be efficient catalysts for the cyclization of propargylic alcohols and isocyanates. Domino cyclization reactions were carried out using isopropyl-substituted imidazolium salt as a precatalyst, and a wide range of substituted oxazolidinones were obtained in high yields.
5-Exo-dig aminocylization/hydroxyfluorination of propargylic carbamates
作者:Antonio Arcadi、Marco Chiarini、Luana Del Vecchio、Fabio Marinelli
DOI:10.1016/j.jfluchem.2018.04.002
日期:2018.7
The reaction was effectively promoted by NaHCO3 and/or silver catalysis. The peculiar behavior of propargylic carbamates bearing a chiral steroidal moiety is described. Extensions and limitations of the procedure with respect to urea derivatives, homopropargyl compounds, internal alkynes and one-pottransformations of propargylic alcohols with isocyanates are reported.