Microwave-Accelerated Solvent-Free Synthesis of Thioketones, Thiolactones, Thioamides, Thionoesters, and Thioflavonoids
摘要:
[GRAPHICS]An expeditious, solvent free, and high yield conversion of ketones, flavones, isoflavones, lactones, amides, and esters to the corresponding thio analogues is described utilizing Lawesson's reagent in a process that circumvents the use of dry solvents and excess of the reagent.
Methods for indole alkaloid synthesis. A specific procedure for introducing the 6,7 double bond into Aspidosperma-type alkaloids via thiolactam dehydrogenation
作者:Philip. Magnus、Paul A. Pappalardo
DOI:10.1021/ja00262a005
日期:1986.1
Reaction of the indole (I) with the amines (II) gives the imines (III), which are treated with the mixed anhydride (IV) to afford the tetracyclic lactam (V).
吲哚(I)与胺(II)的反应得到亚胺(III),其用混合酸酐(IV)处理得到四环内酰胺(V)。
A Simple Route to 2-Alkenethioic<i>O</i>-Esters and 2-Alkenedithioic Esters [Thiono- and Dithioesters, 37]
作者:K. Hartke、O. Kunze、W. Hoederath
DOI:10.1055/s-1985-31402
日期:——
The reaction of the copper(I) derivative of dimethyl methanephosphonic ester with O-alkyl carbonochloridothioates affords O-alkyl (dimethoxyphosphinyl)-thioacetates. These compounds as well as the corresponding dithioesters react with aldehydes in a Horner-Emmons reaction to give O-alkyl 2-alkenethioates or alkyl 2-alkenedithioates, respectively.
[EN] METHODS AND COMPOSITIONS FOR PRODUCING DIFLUOROMETHYLENE-AND TRIFLUOROMETHYL-CONTAINING COMPOUNDS<br/>[FR] PROCÉDÉS ET COMPOSITIONS POUR LA FABRICATION DE COMPOSÉS CONTENANT DU DIFLUOROMÉTHYLÈNE ET DU TRIFLUOROMÉTHYLE
申请人:IM & T RES INC
公开号:WO2009076345A1
公开(公告)日:2009-06-18
New methods for producing difluoromethylene-containing compounds with phenylsulfur trifluoride or a primary alkyl-substituted phenylsulfur trifluoride are disclosed. Also, new methods for producing trifluoromethyl-containing compounds with phenylsulfur trifluoride or primary alkyl-substituted phenylsulfur trifluoride are also disclosed.
Ethylene alpha-olefin polymer substituted Mannich base lubricant dispersant additives
申请人:EXXON CHEMICAL PATENTS INC.
公开号:EP0356010A1
公开(公告)日:1990-02-28
The present invention is directed to oil-soluble lubricating oil additives comprising Mannich Base condensates of an alkyl substituted hydroxy aromatic compound with formaldehyde and an amine, wherein the alkyl-moiety of the aromatic compounds is derived from at least one ethylene alpha-olefin copolymer of 300 to 10,000 number average molecular weight, wherein at least about 30% of the polymer's chains contain terminal ethenylidene unsaturation. The Mannich Base condensates of this invention are useful as dispersants.
The present invention is directed to oil-soluble lubricating oil additives comprising Mannich Base condensates of (A) and ethylene-alpha-olefin polymer substituted mono- or dicarboxylic acid material, (B) an optionally alkyl-substituted N-hydroxyaryl compound, (C) an aldehyde, and (D) an amine, wherein the polyer moiety of the mono- or dicarboxylic acid material is derived from at least one terminally unsaturated ethylene alpha-olefin copolymer of 300 to 10,000 number average molecular weight, wherein the terminal unsaturation comprises ethenylidene unsaturation. The Mannich Base condensates of this invention are useful as dispersants.