BF3-promoted hydrostannation of N-heteroatom-substituted imines for the reduction of CN bond
摘要:
Hydrostannation of n-heteroatom-substituted imines such as oxime ethers, hydrazones, oximes, nitrones, and V-sulfonyl imines using a combination of Bu3SnH and (BF3OEt2)-O-. has been systematically studied. Not only aromatic aldimines but also kitimines and aliphatic imines were reduced to give the corresponding amines. (C) 2002 Elsevier Science Ltd. All rights reserved.
Alkylative amination of aldehydes was achieved via a carbon-carbon bondformation by the intermolecular alkyl radical addition to the carbon-nitrogen doublebond of oxime ethers generated in situ from aldehydes and benzyloxyamine. Alkyl radical addition to oxime ethers via a route involving the iodine atom-transfer process was found to be largely dependent on the reaction temperature and eliminated