Nickel(II)-Catalyzed [8 + 3]-Cycloaddition of 2-Aryl- N-tosylaziridines with Tropone.
Honglei LiuHao JiaWangyu ShiChang WangCheng ZhangHongchao GuoPublished in: Organic letters (2018)
The Ni-catalyzed [8 + 3]-cycloaddition of tropone with 2-aryl- N-tosylaziridines proceeded smoothly under mild reaction conditions, affording various 4-tosyl-2,3,4,4a-tetrahydrocyclohepta[ b][1,4]oxazine derivatives in moderate to excellent yields.