Lithiation and Alkylation of the Imidazole Backbone
作者:Frida Johanne Lundevall、Hans‐René Bjørsvik
DOI:10.1002/ejoc.202201504
日期:2023.5.12
A method for the alkylation of the imidazole backbone has been developed. Imidazole was protected with tetrahydro-2H-pyran-2-yl and chloro groups, respectively. The backbone (position 5) of imidazole was then lithiated and alkylated with haloalkanes, aldehydes, and ketones. The protective groups were removed by treatment with acid and base and hydrogenation. The method proved good functional group
Disclosed herein, inter alia, are compounds, modified nucleotides, compositions, and methods of using the same.
本文特别公开了化合物、修饰核苷酸、组合物以及使用它们的方法。
Synthesis and histamine H3 receptor activity of 4-(n-alkyl)-1H-imidazoles and 4-(ω-phenylalkyl)-1H-imidazoles
作者:Iwan J.P De Esch、Aziz Gaffar、Wiro M.P.B Menge、Henk Timmerman
DOI:10.1016/s0968-0896(99)00253-9
日期:1999.12
The influence of lipophilic moieties attached to a 4-1H-imidazole ring on the histamine H-3 receptor activity was systematically investigated. Series of 4-(n-alkyl)-1H-imidazoles and 4-(omega-phenylalkyl)-1H-imidazoles were prepared, with an alkyl chain varying from 2-9 methylene groups and from 1-9 methylene groups, respectively. The compounds were tested for their activity on the H-3 receptor under in vitro conditions. For the 4-(n-alkyl)-1H-imidazoles the activity is proportional to chain length, ranging from a pA(2) value of 6.3 +/- 0.2 for 4-(n-propyl)-1H-imidazoIe to a pA(2) value of 7.2 +/- 0.1 for 4-(n-decyl)-1H-imidazole. For the series 4-(omega-phenylalkyl)-4H-imidazoles an optimum in H-3 activity was found for the pentylene spacer: 4-(omega-phenylpentyl)-1H-imidazole has a pA(2) value of 7.8 +/- 0.1. (C) 1999 Elsevier Science Ltd. All rights reserved.
ADHESIVE COMPOSITION
申请人:SUWA Tatsuhiro
公开号:US20120108733A1
公开(公告)日:2012-05-03
An adhesive composition, an optical member, a surface protective film, and an adhesive sheet, the adhesive composition including 100 parts by weight of a (meth)acrylic copolymer having a weight average molecular weight of about 100,000 to about 2,000,000 g/mol; about 0.05 to about 5 parts by weight of a carbodiimide crosslinker, based on 100 parts by weight of the (meth)acrylic copolymer; and about 0.001 to about 5 parts by weight of an imidazole compound represented by Formula 1, based on 100 parts by weight of the (meth)acrylic copolymer:
wherein, in Formula 1, R
1
, R
2
, and R
3
are each independently a hydrogen atom, a halogen atom, or a substituted or unsubstituted C1 to C10 straight or branched alkyl group.
ADHESIVE COMPOSITION, ADHESIVE LAYER, OPTICAL MEMBER, AND ADHESIVE SHEET
申请人:OGAWA Hirosh
公开号:US20120309873A1
公开(公告)日:2012-12-06
An adhesive composition, an adhesive layer, an optical member, and an adhesive sheet, the adhesive composition including 100 parts by weight of a (meth)acrylic copolymer, the (meth)acrylic copolymer having a weight average molecular weight of about 100,000 to about 2,000,000 g/mol; about 0.05 to about 5 parts by weight of a carbodiimide crosslinker; and about 0.01 to about 0.3 parts by weight of an organic group-containing compound, the organic group-containing compound including at least one selected from the group of titanium, zirconium, and hafnium.