Stereoselective Reactions of Allylic Hydroxy Phosphonates
作者:M. Antonette De La Cruz、Hossein Shabany、Christopher D. Spilling
DOI:10.1080/10426509908546212
日期:1999.1.1
The stereochemical outcome of the palladium catalyzed addition of nucleophiles to the carbonate derivative, the [3,3] rearrangement of the imidate and carbamate derivatives, and the epoxidation and cyclopropanation of hydroxy allylicphosphonates is presented.
Substituent effects in the reaction of allyl trichloroacetimidates with N-halosuccinimides: Cyclization vs aza-Claisen rearrangement
作者:Hossein Shabany、Christopher D. Spilling
DOI:10.1016/s0040-4039(97)10837-1
日期:1998.3
We report a novel substituent effect in the reaction of allylic trichloroacetimidates with N-halosuccinimides. Reaction of E allylic tricloroacetimidates bearing phosphonate or cyano substituents with NBS in CHCl3 results in a [3.3] sigmatropic rearrangement. In contrast, the Z allylic phosphonate or phenyl substituted allylic trichloroacetimidate undergo halocyclization.