Carbon–carbon bond formations at the benzylic positions of N-benzylxanthone imines and N-benzyldi-1-naphthyl ketone imine
摘要:
Two N-benzyl imines are designed to allow for carbon-carbon bond formations at the aminated benzylic positions. Direct benzylic arylation reactions of N-benzylxanthone imine with aryl chlorides proceed under palladium catalysis in the presence of cesium hydroxide, yielding the corresponding benzhydrylamine derivatives. Alkylation reactions of N-benzyldi-1-naphthyl ketone imine with alkyl halides in the presence of potassium tert-butoxide afford the corresponding 1-phenylalkylamines in high yields. Conjugate addition of N-benzyldi-1-naphthyl ketone imine is also described. (C) 2009 Elsevier Ltd. All rights reserved.
Organometallic reactions in aqueous media. Indium-mediated allylation of sulfonimines
作者:Tak Hang Chan、Wenshuo Lu
DOI:10.1016/s0040-4039(98)01926-1
日期:1998.11
Barbier-type allylation of sulfonimines with indium and allyl bromide to give homoallylic sulfonamides can be performed smoothly in organic solvents and in aqueousmedia. The regio- and the stereoselectivity of the reaction have been examined.
Synthesis of Enantiopure Benzyl Homoallylamines by Indium-Mediated Barbier-Type Allylation Combined with Enzymatic Kinetic Resolution: Towards the Chemoenzymatic Synthesis of N-Containing Heterocycles
作者:Ari Hietanen、Tiina Saloranta、Sara Rosenberg、Evelina Laitinen、Reko Leino、Liisa T. Kanerva
DOI:10.1002/ejoc.200901216
日期:2010.2
N-(dimethylsulfamoyl)-protected aldimines with a number of allyl bromides followed by high-yielding deprotection afforded allylic amines in good to excellent yields. The racemic amines were then subjected to enzymatic kinetic resolution in order to obtain the corresponding (S)-amines and (R)-amides. When acyl donors with a terminal double bond were applied in the enzymatic kinetic resolution, the product amide