摘要:
There are provided a novel cyclic olefin compound having a photoreactive group and a photoreactive polymer. The cyclic olefin compound is applicable to various photoreactions, such as of liquid crystal alignment layers and can be preferably used as a precursor of various organic compounds or polymers.
摘要:
A method for producing 1,2-bis (indenyl) ethanes in good yield is described. An agent and its application for isomerizing kinetic EBI to thermodynamic EBI and for isomerizing meso TMS-EBI to rac TMS-EBI are exemplified.
摘要:
Acylating agents comprising: (A) a 1,2-dicarbonyl compound or its hydroxy-reduction derivative; (B) an enzyme; and (C) at least one compound selected from among (c1) metal compounds and (c2) imide compounds such as N-hydroxyphthalimide. As the 1,2-dicarbonyl compound or its hydroxy-reduction derivative (A), use may be made of biacetyl, 2,3-butanediol, etc. As the metal compounds (c1), use may be made of a cobalt compound such as cobalt acetate. An acyl group can be efficiently introduced into a methine carbon atom by treating a compound carrying a methine carbon atom such as an adamantane derivative by the above acylating agent.
摘要:
Bridged cyclopentadienyl derivatives having general formula (I)
A-X-B (I)
wherein:
1) A is a monofunctional hydrocarbyl radical having general formula (II)
2) -X- is the bridge between A and B and consists of a bifunctional radical selected from an alkylene group, a silanylene group, an alkyl substituted silaalkylene group, a siloxasilanylene group; 3) B is a monofunctional hydrocarbyl radical selected from:
e) any of the A radicals defined above, f) a cyclopentadienyl radical.
摘要:
X = BF 4 , CIO 4 , halogène Y = tert-butyle, tétrahydropyranyle, trialkyl-silyle Z = halogène Ar= aryle R = H, CH 3
Les sels de phosphonium de formule (1) sont préparés à l'aide d'une réaction d'addition à partir des composés de formule (II), (IV) ou (V) au moyen de dérivés organiques du phosphore. Les produits ainsi obtenus sont utilisés en tant que produits de départ pour la préparation des composés bicycliques insaturés de formule (VI).