Spiro(imidazo[1,2-a]pyrano[2,3-c]pyridine-9-indenes) as inhibitors of gastric acid secretion
摘要:
Asymmetric and symmetric spiro(imidazo[1,2-a]pyrano[2,3-c]pyridine-9-indenes) were prepared using a synthetic approach that comprised a cross-metathesis reaction and an acid-catalyzed cycloisomerisation as key steps. The target compounds constitute potent inhibitors of the gastric proton pump enzyme with inhibitory activity comparable to potassium-competitive acid blockers (P-CABs) belonging to the known 9-aryl-7H-8,9-dihydropyrano[2,3-c]imidazo[1,2-a]pyridine series. Spiro(imidazo[1,2-a]pyrano[2,3-c]pyridine-9,2'-indenes) represent the first example for P-CABs, in which the distance between the heterocyclic scaffold and the aryl residue has been modified, and are promising candidates for further development as anti-ulcer drugs. (C) 2008 Elsevier Ltd. All rights reserved.
Arrhenius parameters for rearrangements of the neophyl, 1-indanylmethyl, 2-allylbenzyl, and 2-(2-vinylphenyl)ethyl radicals relative to hydrogen abstraction from tributylstannane
作者:James A. Franz、Russell D. Barrows、Donald M. Camaioni
DOI:10.1021/ja00326a013
日期:1984.7
The temperature dependence of rates of several radical rearrangements relative to abstraction of hydrogen atom from tributylstannane has been determined. The rearrangement of 2-phenyl-2-methylpropyl to 1-phenyl-2-methylprop-2-yl (neophyl rearrangement) relative to hydrogenabstraction is represented by log (r/M) = (2.48 +/- 0.08) - (8.13 +/-0.16)/theta, theta = 2.3 RT kcal/mol. The rearrangement of
[EN] ORGANOSILANE, IONIC ORGANOSILANE, MEMBRANE COMPOSITION, AND MEMBRANE<br/>[FR] ORGANOSILANE, ORGANOSILANE IONIQUE, COMPOSITION DE MEMBRANE ET MEMBRANE
申请人:3M INNOVATIVE PROPERTIES CO
公开号:WO2020254930A1
公开(公告)日:2020-12-24
A dihaloorganosilane is represented by the formula (I): Each X independently represents C1, Br, or I. Each Ar1 independently represents a phenylene group optionally substituted by 1 to 4 alkyl groups selected from methyl or ethyl. Each R1 independently represents an alkylene group having from 2 to 18 carbon atoms. Each R2 independently represents methyl or ethyl. Each R3 independently represents an alkylene group having from 1 to 18 carbon atoms. Each R4 independently represents an alkylene group having from 2 to 18 carbon atoms, and n is an integer in a range of 0 to 5, inclusive. Ionic organosilanes preparable from the dihaloorganosilanes are represented by the formula (II): Membrane compositions and membranes containing the ionic organosilanes are also disclosed.
Photolytic Reactions of (o-Allylbenzyl)dicarbonyl(?5-cyclopentadienyl)iron
作者:Gebhard Thoma、Bernd Giese
DOI:10.1002/hlca.19920750415
日期:1992.6.24
Photolysis of (o-allylbenzyl)dicarbonyl(η5-cyclopentadienyl)iron (4) at 20° in CH2Cl2 leads to carbon-monoxide loss followed by intramolecular complexation to [η2-(o-allylbenzyl)]carbonyl(η5-cyclopentadienyl)iron (13). At 50° in C6D6, a photochemical rearrangement proceeds forming carbonyl (η5-cyclopentadienyl)η3-[3-(2-methylphenyl)allyl]}iron (17). Depending on the temperature, photolysis of 4 leads
CYCLOHEXANE POLYCARBOXYLIC ACID DERIVATIVES AS PLASTICIZERS FOR ADHESIVES AND SEALANTS
申请人:Mack Helmut
公开号:US20110232825A1
公开(公告)日:2011-09-29
The invention provides an adhesive or sealant comprising at least (A) one compound selected from the group consisting of silylated polyurethanes, silylated polyureas, silylated polyethers, silylated polysulfides and silyl-terminated acrylates, and at least (B) one cyclohexane polycarboxylic acid derivative. The composition has enhanced extensibility with good adhesion properties and high tensile strength. A process is disclosed for preparing the adhesive or sealant, and also disclosed is the use thereof for producing material bonds between parts to be joined.
Polyalkylene oxide having unsaturated end group and narrow molecular weight distribution
申请人:KANEGAFUCHI KAGAKU KOGYO KABUSHIKI KAISHA
公开号:EP0196565A1
公开(公告)日:1986-10-08
polyalkylene oxide having unsaturated end groups. The polymer has a distribution of molecular weight Mw/Mn of not more than 1.5, and a process for the same. The polymer is useful as rubber materials, and can provide cured rubber having an excellent elongation.