摘要:
Diastereoisomers of laterally lithiated tertiary naphthamides are configurationally stable at the lithium-bearing stereogenic centre at -40 degrees C, The syn diastereoisomer, which may be formed by stereoselective deprotonation or stereospecific transmetallation, reacts stereospecifically, but both the tin-lithium exchange leading to the anti diastereoisomer and its subsequent reactions are characterised by an unprecedented lack of stereospecificity. (C) 1997 Elsevier Science Ltd.