A new internal, base-mediated redox-cyclisation reaction has been discovered and developed. In this transformation, the sacrificial reduction of an alkynyl moiety to an alkene allows direct functionalisation of an alpha-amino C-H bond. This approach allows the preparation of several 1,3-oxazinane derivatives in an atom-efficient manner.
作者:Igor D. Jurberg、Bo Peng、Eckhard Wöstefeld、Maximilian Wasserloos、Nuno Maulide
DOI:10.1002/anie.201108639
日期:2012.2.20
Sacrifice for the team: A one‐pot method achieves remote functionalization at the α‐position of an amine moiety through the sacrificial reduction of a neighboring group. The process takes advantage of an intramolecular redox reaction, thereby avoiding the need for any external oxidants. This method was applied to a concise five‐step total synthesis of indolizidine 167B.
A new internal, base-mediated redox-cyclisation reaction has been discovered and developed. In this transformation, the sacrificial reduction of an alkynyl moiety to an alkene allows direct functionalisation of an alpha-amino C-H bond. This approach allows the preparation of several 1,3-oxazinane derivatives in an atom-efficient manner.