[4+1] Cycloaddition of N-acylimine derivatives with isocyanides: efficient synthesis of 5-aminooxazoles and 5-aminothiazoles
作者:Takahiro Soeta、Kaname Tamura、Yutaka Ukaji
DOI:10.1016/j.tet.2014.03.016
日期:2014.5
[4+1] Cycloaddition reaction between isocyanides and N-acylimine derivatives generated from N-acyl N,O-acetals acting as isocyanophiles has been developed. These reactions proceeded smoothly and cleanly to afford the corresponding 5-aminooxazoles in high yields. This reaction was extended to the syntheses of 5-aminothiazoles by using N-thioacyl N,O-acetals. A wide range of N-acyl N,O-acetals, N-thioacyl
Sustainable Access to 5‐Amino‐Oxazoles and Thiazoles via Calcium‐Catalyzed Elimination‐Cyclization with Isocyanides
作者:Ashley J. Basson、Mark G. McLaughlin
DOI:10.1002/cssc.202100225
日期:2021.4.9
Herein, we report a sustainable, modular, rapid and high‐yielding transformation to afford densely functionalized 5‐aminooxazoles and thiazoles. The reaction is tolerant to a wide range of functional groups and is typically complete in under 30 min. Furthermore, the described transformation is inherently green in relation to the catalyst and solvent choice as well as producing environmentally benign