[EN] METHODS AND COMPOSITIONS FOR MODULATING SPHINGOSINE-1-PHOSPHATE (S1P) RECEPTOR ACTIVITY [FR] PROCEDES ET COMPOSITIONS SERVANT A MODULER L'ACTIVITE DU RECEPTEUR DE LA SPHINGOSINE-1-PHOSPHATE (S1P)
Selective C(sp3)-C(sp2) bond construction is of central interest in chemical synthesis. Despite the success of classic cross-coupling reactions, the cross-dehydrogenative coupling between inert C(sp3)-H and C(sp2)-H bonds represents an attractive alternative toward new C(sp3)-C(sp2) bonds. Herein, we establish a selective inter- and intramolecular C(sp3)-H arylation of alcohols with nondirected arenes
Optically active biphenyl derivative, process for preparation thereof, liquid crystal composition containing the same as effective component, and liquid crystal element using the same
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0395390A1
公开(公告)日:1990-10-31
Disclosed herein are a novel optically active biphenyl derivative, a process of the preparation thereof a ferroelectric liquid crystal composition containing the same and a liquid crystal element using the composition.
The above optically active biphenyl derivatives including optically active biphenyl carboxylic acid derivative, hydroxybiphenyl derivative, alkoxybiphenylalkanol derivative and alkylbiphenylalkanol derivative have the following structural formula:
wherein R' represents an alkyl group of 3-20 carbon atoms, R2 represents an alkyl group or alkoxyalkyl group of 1-20 carbon atoms which may optionally be substituted with at least one halogen atom. X represents -0-, -COO-or -OCO-. m represents 0 or 1, n represents an integer of 1-6 and p represents 0 or 1. mark represents an asymmetric carbon atom.
These optically active' biphenyl derivatives are useful as a ferroelectric liquid crystal material or its component having a sufficient spontaneous polarization and by which a high speed response is possible and which further exhibits a ferroelectric liquid crystal phase in a temperature region around room temperature.
PHOTOSENSITIVE RESIN COMPOSITION, METHOD FOR FORMING SILICA COATING FILM, AND APPARATUS AND MEMBER EACH COMPRISING SILICA COATING FILM
申请人:Aoki Yousuke
公开号:US20120021190A1
公开(公告)日:2012-01-26
The photosensitive resin composition of the invention comprises component (a): a first siloxane resin obtained by hydrolytic condensation of a first silane compound comprising a compound represented by the following formula (1), component (b): a solvent in which component (a) dissolves, and component (c): an ester of a phenol or alcohol and naphthoquinone diazide sulfonic acid.