Photocycloaddition of Six-Membered Cyclic Enones to Propen-2-yl Isocyanate
作者:Maryam Bahaji、Paul Margaretha
DOI:10.1002/hlca.200790149
日期:2007.8
On irradiation in the presence of propen-2-yl isocyanate (4), six-memberedcyclicenones 3 are converted into regio- and stereoisomeric mixtures of [2+2] cycloadducts 5–10; the preferentially formed HT products, 5–8, can be converted into the corresponding bicyclic amines by acid hydrolysis, whereas, under these conditions, the regioisomeric HH-isocyanato derivatives undergo a retro-Mannich reaction
Spacer for liquid crystal display and liquid crystal display made by
申请人:Kao Corporation
公开号:US05942292A1
公开(公告)日:1999-08-24
The present invention provides a spacer for a liquid crystal display which is excellent in light shielding properties, does not suffer from fading even after the lapse of a long period, thus being excellent in long-term reliability, and has satisfactory strengths and a liquid crystal display made by using the spacer. The above spacer is composed of colored fine particles prepared by copolymerizing a polymerizable anthraquinone dye having at least one ethylenically unsaturated bond in the molecule with an ethylenically unsaturated monomer component in an aqueous medium.