The Nucleophilic 5-endo-trig Cyclization of 1,1-Difluoro-1-alkenes: Ring-Fluorinated
Hetero- and Carbocycle Synthesis and Remarkable Effect of
the Vinylic Fluorines on the Disfavored Process
Controlled Synthesis of 2- and 3-Substituted Benzo[<i>b</i>]furans
作者:Tao Pei、Cheng-yi Chen、Lisa DiMichele、Ian W. Davies
DOI:10.1021/ol102123u
日期:2010.11.5
A controlled regioselective synthesis of either C-2 or C-3 substituted benzo[b]furans from readily accessible 1-(2-hydroxyphenyl)-2-chloroethanones is described. Addition of a range of Grignard reagents to the α-chloro ketones generates alkoxide intermediates, which can form either 2-substituted benzo[b]furans via a [1,2]-arylmigration or 3-substituted benzo[b]furans via a direct cyclization and dehydration
描述了从容易获得的1-(2-羟苯基)-2-氯乙酮的C-2或C-3取代的苯并[ b ]呋喃的受控区域选择性合成。在α-氯代酮中添加一系列格氏试剂可生成醇盐中间体,该中间体可通过[1,2]-芳基迁移形成2-取代的苯并[ b ]呋喃,或通过a形成3-取代的苯并[ b ]呋喃。直接环化和脱水序列。提出了一种温度依赖性的[1,2]-芳基迁移机制,用于形成2-取代的苯并[ b ]呋喃。
Palladium-catalyzed bisarylation of 3-alkylbenzofurans to 3-arylalkyl-2-arylbenzofurans on water: tandem C(sp<sup>3</sup>)–H and C(sp<sup>2</sup>)–H activation reactions of 3-alkylbenzofurans
作者:Beom Shin Cho、Young Keun Chung
DOI:10.1039/c5cc04052c
日期:——
A protocol involving facile sequential C(sp3)–H and C(sp2)–H activation reactions of 3-alkylbenzofurans catalyzed by Pd(OAc)2 in the presence of pivalic acid, silver salt, and tricyclohexylphosphine ‘on water’ was developed.
Composition containing carbon nanotubes having coating thereof and process for producing them
申请人:Saitoh Takashi
公开号:US20060052509A1
公开(公告)日:2006-03-09
The object of the present invention is to provide a carbon nanotube composition that does not impair the characteristics of the carbon nanotubes itself, allows the carbon nanotubes to be dispersed or solubilized in a solvent, does not cause separation or aggregation of the carbon nanotubes even during long-term storage, has superior electrical conductivity, film formability and moldability, can be easily coated or covered onto a base material, and the resulting coated film has superior moisture resistance, weather resistance and hardness; a composite having a coated film composed thereof; and, their production methods. In order to achieve this object, the present invention provides a carbon nanotube composition that contains a conducting polymer (a) or heterocyclic compound trimer (i), a solvent (b) and carbon nanotubes (c), and may additionally contain a high molecular weight compound (d), a basic compound (e), a surfactant (f), a silane coupling agent (g) and colloidal silica (h) as necessary; a composite having a coated film composed of the composition; and, their production methods.
Carbon Nanotube Composition, Composite Having a Coated Film Composed of the Same, and Their Production Methods
申请人:SAITOH Takashi
公开号:US20090321688A1
公开(公告)日:2009-12-31
The object of the present invention is to provide a carbon nanotube composition that does not impair the characteristics of the carbon nanotubes itself, allows the carbon nanotubes to be dispersed or solubilized in a solvent, does not cause separation or aggregation of the carbon nanotubes even during long-term storage, has superior electrical conductivity, film formability and moldability, can be easily coated or covered onto a base material, and the resulting coated film has superior moisture resistance, weather resistance and hardness; a composite having a coated film composed thereof; and, their production methods. In order to achieve this object, the present invention provides a carbon nanotube composition that contains a conducting polymer (a) or heterocyclic compound trimer (i), a solvent (b) and carbon nanotubes (c), and may additionally contain a high molecular weight compound (d), a basic compound (e), a surfactant (f), a silane coupling agent (g) and colloidal silica (h) as necessary; a composite having a coated film composed of the composition; and, their production methods.