Highly Efficient Aminocarbonylation of Iodoarenes at Atmospheric Pressure Catalyzed by a Robust Acenaphthoimidazolyidene Allylic Palladium Complex
摘要:
A robust allylic palladium-NHC complex was developed and exhibited extremely high catalytic activity toward aminocarbonylation of various (hetero)aryl iodides under atmospheric carbon monoxide pressure, in which a broad range of secondary and primary amines were well tolerated. In addition, the concise synthesis of an anticancer drug tamibarotene was accomplished even in a gram scale, further highlighting the practical applicability of the protocol.
Rearrangement of nitrones to amides using chlor0sulfonyl isocyanate
作者:Sajan P. Joseph、D.N. Dhar
DOI:10.1016/s0040-4020(01)96081-8
日期:1986.1
Reaction of chlorosulfonyl isocyanate (CSI) with nitrones a-n and a,b has been studied. α, α, N-Triaryl nitrones a-n react with CSI to form the N,N-diaryl arylamides a-n and i-n in good yields. In the case of α-H, α, N-diaryl nitrones a,b however, two compounds viz., the rearranged product a,b and the 1,4-dihydro tetrazines a,b are formed.