Palladium-Catalyzed Benzylic Arylation of <i>N</i>-Benzylxanthone Imine
作者:Takashi Niwa、Hideki Yorimitsu、Koichiro Oshima
DOI:10.1021/ol802070d
日期:2008.10.16
The direct benzylicarylation of N-benzylxanthone imine with aryl chloride proceeds under palladium catalysis, yielding the corresponding coupling product. The product is readily transformed to benzhydrylamine. Taking into consideration that the imine is readily available from benzylic amine, the overall transformation represents a formal cross-coupling reaction of aryl halide with alpha-aminobenzyl
In particular, the present invention is concerned with compounds of the general formula (I)
wherein X, Y and R
1
to R
10
are as described herein. The compounds are V1a receptor antagonists. The invention also relates to the manufacture of compounds of formula I, pharmaceutical compositions containing them and their use for the treatment of anxiety and depressive disorders and other diseases.
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.
Design, synthesis and structure–activity relationship of simple bis-amides as potent inhibitors of GlyT1
Several novel classes of potent and small amide-type inhibitors of glycine transport (GlyT1) were developed through sequential simplification of a benzodiazepinone-lead structure identified from a high-throughput screening. The most potent compounds of these structurally simple classes show low nanomolar inhibition at the GlyT1 target. (c) 2008 Elsevier Ltd. All rights reserved.
DI-AROMATIC SUBSTITUTED AMIDES AS INHIBITORS FOR GLYT1