ZnCl2-catalyzed three-component coupling reaction involving a variety of functionalized enamines, triethyl orthoformate, and ammonium acetate, which leads to the production of 4,5-disubstituted pyrimidinederivatives in a single step. The procedure can be successfully applied to the efficient synthesis of mono- and disubstituted pyrimidinederivatives, using methyl ketone derivatives instead of enamines
Oxidative Annulations Involving DMSO and Formamide: K<sub>2</sub>S<sub>2</sub>O<sub>8</sub> Mediated Syntheses of Quinolines and Pyrimidines
作者:Santosh D. Jadhav、Anand Singh
DOI:10.1021/acs.orglett.7b02838
日期:2017.10.20
An efficient strategy toward 4-arylquinolines and 4-arylpyrimidines from readily available precursors is described. Oxidative annulationpromoted by K2S2O8 involving anilines, aryl ketones, and DMSO as a methine (═CH−) equivalent leads to 4-arylquinolines via a cascade that entails generation of a sulfenium ion, subsequent C–N and C–C bond formations, and cyclization. The application of this strategy
描述了从容易获得的前体制备4-芳基喹啉和4-芳基嘧啶的有效策略。K 2 S 2 O 8促进的涉及苯胺,芳基酮和DMSO的亚甲基(═CH-)等效的氧化环化反应通过级联反应生成4-芳基喹啉,该级联反应会生成generation离子,随后的C–N和C– C键的形成和环化。还描述了该策略在乙酰苯甲酰胺甲酰胺偶联物的活化中对4-芳基嘧啶合成的应用。
PHENETHYLAMIDE DERIVATIVES AND THEIR HETEROCYCLIC ANALOGUES
申请人:Aissaoui Hamed
公开号:US20110212968A1
公开(公告)日:2011-09-01
The invention relates to novel phenethylamide derivatives and their wherein A, B, R
1
, R
2
and R
3
are as described in the application, and to the use of such compounds, or of pharmaceutically acceptable salts of such compounds, as medicaments, especially as orexin receptor antagonists.
Process for the extraction of metal values and novel metal extractants
申请人:Imperial Chemical Industries Limited
公开号:US04576815A1
公开(公告)日:1986-03-18
Metal values are extracted from aqueous solutions of metal salts containing halide or pseudo halide ions by pyrimidine, pyrazine or pyridazine derivatives bearing the substituent --(C.dbd.O.X).sub.n where X is the group --OR.sub.1 or --NR.sub.2 R.sub.3 and n is 1, 2 or 3. R.sub.1 is a hydrocarbyl group containing from 1 to 36 carbon atoms and R.sub.2 and R.sub.2 together contain from 1 to 36 carbon atoms. The molecule as a whole contains from 5 to 36 alkyl carbon atoms and may carry further optional substituents. The process is especially useful for the recovery of metals from leach solutions derived from sulphur-containing ores.
AZO METAL CHELATE DYE AND OPTICAL RECORDING MEDIUM
申请人:Shoda Hisashi
公开号:US20100015382A1
公开(公告)日:2010-01-21
The invention provides an azo metal chelate dye suitable for use in a recording layer of an optical recording medium capable of high-speed recording or an optical recording medium having plural recording layers, and an optical recording medium. The azo metal chelate dye comprises an azo dye compound represented by general formula (1) and a metal:
(wherein R
1
represents a linear or branched alkyl group that may be substituted or a cycloalkyl group that may be substituted; R
2
and R
3
each independently represents a hydrogen atom, a linear or branched alkyl group that may be substituted, an aryl group that may be substituted, or a heterocyclic group that may be substituted; R
4
, R
5
, R
6
, R
7
, and R
8
each independently represents a hydrogen atom or a linear or branched alkyl group that may be substituted, and R
4
and R
5
, R
4
and R
6
, or R
5
and R
7
may be bonded to each other to form a ring; Y represents a linear or branched alkyl group substituted with at least two fluorine atoms; and the chelate dye is constituted of the compound represented by general formula (1) from which a proton is released, and the metal).