Disclosed are electroluminescent devices that comprise organic layers that contain certain 2H-benzotriazole compounds. The 2H-benzotriazole compounds of blue-emitting, durable, organo-electrouminescent layers. The electroluminescent devices may be employed for full color display panels in for example mobile phones, televisions and personal computer screens.
Process for preparation of cinnamates using polyaniline salts as catalysts
申请人:——
公开号:US20040049068A1
公开(公告)日:2004-03-11
The present invention relates to a process for preparation of cinnamates using polyaniline salts as catalysts. The present invention more particularly relates to a process for producing cinnamic esters by the direct esterification of cinnamic acid with aliphatic alcohols over polyaniline salts as catalysts.
The process of esterification may be carried out by reacting cinnamic acid with aliphatic mono hydric alcohol in presence of catalyst, removing the catalyst by conventional methods. The ester can be isolated such as filtration followed by isolation of esters by conventional column chromatography using adsorbent such as silica gel and solvent such as chloroform, ethylacetate, hexane and mixture there off
[EN] UV ABSORBING COMPOUNDS<br/>[FR] COMPOSÉS ABSORBANT LES UV
申请人:FUJIFILM MFG EUROPE BV
公开号:WO2009038463A1
公开(公告)日:2009-03-26
The invention relates to new, highly efficient UV - absorbing compounds, a process for their manufacturing and to uses of these UV - absorbing compounds. The UV - absorbing compounds are in particular UV - A - absorbing compounds according to Formula (VI) or (VII): R2CH2 - N(R17)-(CR12)m-N(R17)-CH2R2 (VI) N(R17)3-n[(CR12)m-N(R17)-CH2R2]n} (VII)
Vilsmeier reaction with 14-hydroxydihydrocodeinone and derived enol ethers
作者:M.G. Lester、V. Petrow、O. Stephenson
DOI:10.1016/s0040-4020(01)99134-3
日期:1964.1
The reaction of 14-hydroxydihydrocodeinone and some of its derived 6-enol ethers with a Vilsmeier reagent, are described. Structures are proposed and reaction mechanisms suggested for the various products formed. The reaction of one of these products, 7-formyl-14-hydroxy-6-methoxy-°6,7-dihydrodeoxycodeine, with certain organic bases is discussed.
synthesis of new Mannichbases containing various heterocyclicrings (thiazole, furane, thiophene, pyridine) by applying the lipase catalyzed trimolecular condensation of the corresponding heterocyclic aldehydes with acetone and primary aromatic amines, in mild and eco-friendly reaction conditions. The obtained Mannichbases were acylated to their corresponding N-acetyl derivatives. All compounds were characterized
本文描述了通过脂肪酶催化相应的杂环醛与丙酮和伯芳香胺的三分子缩合,在温和且环保的反应条件下,生物催化合成含有各种杂环(噻唑、呋喃、噻吩、吡啶)的新曼尼希碱。 . 得到的曼尼希碱被酰化为相应的 N-乙酰基衍生物。所有化合物均通过 1H-NMR、13C-NMR 和 MS 光谱法表征。