Conversion of esters and lactones to ethers via thionoesters and thionolactones using reductive radical desulfurization
作者:Doo Ok Jang、Seong Ho Song、Dae Hyan Cho
DOI:10.1016/s0040-4020(98)01156-9
日期:1999.3
Various thionoesters and thionolactones are readily reduced into the corresponding ethers in high isolated yields by radical desulfurization with organotin hydrides and Et3B under mild reaction conditions.
Improved Procedure for the Reductive Acetylation of Acyclic Esters and a New Synthesis of Ethers
作者:David J. Kopecky、Scott D. Rychnovsky
DOI:10.1021/jo9914521
日期:2000.1.1
acetylation procedure allows a wide variety of esters to be converted into the corresponding alpha-acetoxy ethers in good to excellent yields. It was found that, under mild acidic conditions, many alpha-acetoxy ethers can be further reduced to the corresponding ethers. This net two-step ester deoxygenation is an attractive alternative to the classical Williamson synthesis for certain ethers.
Novolac based epoxy resin curing agents for use in aqueous systems
申请人:INTEREZ, Inc. (a Georgia corporation)
公开号:EP0175588A2
公开(公告)日:1986-03-26
The instant invention is an epoxy resin curing agent based upon an epoxy novolac containing, on the average, between about and 7.5 epoxy groups per molecule, in which substantially all of the epoxide groups are reacted with a polyamine wherein each primary amine hydrogen in the resulting reaction product is further reacted with a monoepoxide or a monocarboxylic acid. The resulting epoxy resin curing agent may be used in a water based system for curing epoxide resins. The curing agent is rendered water soluble or water dispersible by salting with a conventional volatile monocarboxylic acid such as acetic, formic or propionic acid.
Novolac based epoxy resin curing agents for use in solvent
申请人:INTEREZ, Inc. (a Georgia corporation)
公开号:EP0175589A2
公开(公告)日:1986-03-26
The instant invention is an epoxy resin curing agent based upon an epoxy novolac containing, on the average, between about 3 and about 7.5 epoxy groups per molecule, in which substantially all of the epoxide groups are reacted with a polyamine wherein each primary amine hydrogen in the resulting reaction product is further reacted with a monoepoxide. The resulting epoxy resin curing agent may be used in a solvent based system to cure epoxy resins under low temperature curing conditions.
The invention provides a process to prepare a detergent in the presence of a polyether compound. The invention further provides for a lubricating composition containing the detergent. The invention further relates to the use of the lubricating composition in a mechanical device such as an internal combustion engine.