Alkene Difunctionalization Directed by Free Amines: Diamine Synthesis via Nickel-Catalyzed 1,2-Carboamination
作者:Taeho Kang、José Manuel González、Zi-Qi Li、Klement Foo、Peter T. W. Cheng、Keary M. Engle
DOI:10.1021/acscatal.2c00373
日期:2022.4.1
alkenyl amines with aryl/alkenylboronic ester nucleophiles and N–O electrophiles is reported. The reaction proceeds efficiently with free primary and secondary amines without needing a directing auxiliary or protecting group and is enabled by fine-tuning the leaving group on the N–O reagent. The transformation is highly regioselective and compatible with a wide range of coupling partners and alkenyl
Materials for inducing alignment of liquid crystals and liquid crystal
申请人:Elsicon Inc.
公开号:US06103322A1
公开(公告)日:2000-08-15
The present invention provides novel polyamic acids and polyimide optical alignment layers for inducing alignment of a liquid crystal medium. The novel compositions comprise crosslinking diamines containing a C.sub.3 -C.sub.20 linear or branched hydrocarbon chains containing 1 to 4 carbon-carbon double bonds. The invention further describes liquid crystal displays comprising the novel polyimide optical alignment layers.
Crosslinking aromatic diamines for polyimide optical alignment layers
申请人:——
公开号:US06313348B1
公开(公告)日:2001-11-06
The invention provides novel crosslinking aromatic diamines useful in preparing polyamic acids and polyimides for optical alignment layers. The novel compositions comprise crosslinking diamines containing a C3-C20 linear or branched hydrocarbon chains containing 1 to 4 carbon-carbon double bonds.
Process and materials for inducing alignment of liquid crystals and liquid crystal optical elements
申请人:Elsicon, Inc.
公开号:US06491988B1
公开(公告)日:2002-12-10
The present invention provides novel polyamic acids and polyimide optical alignment layers for inducing alignment of a liquid crystal medium. The novel compositions comprise crosslinking diamines containing a C3-C22 linear or branched hydrocarbon chains containing 1 to 4 carbon-carbon double bonds. The invention further describes liquid crystal displays comprising the novel polyimide optical alignment layers.
Materials for inducing alignment of liquid crystals and liquid crystal optical elements
申请人:Elsicon, Inc.
公开号:US06991834B1
公开(公告)日:2006-01-31
The present invention provides novel polyamic acids and polyimide optical alignment layers for inducing alignment of a liquid crystal medium. The novel compositions comprise crosslinking diamines containing a C3–C22 linear or branched hydrocarbon chains containing 1 to 4 carbon—carbon double bonds. The invention further describes liquid crystal displays comprising the novel polyimide optical alignment layers.