Efficient tin hydride-mediated radical cyclisation of secondary amides. Part 1. Synthesis of a variety of substituted pyrrolidinones
作者:Justin S. Bryans、Jonathan M. Large、Andrew F. Parsons
DOI:10.1039/a905806k
日期:——
with a reversible cyclisation leading to the thermodynamically more stable product. The nature of the acceptor carbon–carbon double bond and substituents at the radical centre were found to influence the stereoselectivity of the cyclisation: more of the cis-isomer was isolated from precursors bearing a radical stabilising group on the alkene. This can be explained by a slower radical ring opening (or