Switching Pathways: Room-Temperature Neutral Solvolysis and Substitution of Amides
作者:Marc Hutchby、Chris E. Houlden、Mairi F. Haddow、Simon N. G. Tyler、Guy C. Lloyd-Jones、Kevin I. Booker-Milburn
DOI:10.1002/anie.201107117
日期:2012.1.9
Stick or twist: By introducing steric hindrance at the nitrogen atom, stable linear amides bearing an electron‐withdrawing α‐substituent (Z=Ar, PhSO2, P(O)(OR)2, CN, or CO2R) can be induced to undergo solvolysis and substitution reactions through an elimination–addition mechanism (see picture). Key to this process is a low barrier to rotation around the amide bond and the α‐substituent Z.