The reaction of 1,4‐diols with dimethyl carbonate in the presence of a base led to selective and high‐yielding syntheses of related five‐membered cyclicethers. This synthetic pathway has the potential for a wide range of applications. Distinctive cyclicethers and industrially relevant compounds were synthesized in quantitative yield. The reaction mechanism for the cyclization was investigated. Notably
Verfahren zur Verbesserung der Löslichkeit biologisch aktiver Wirkstoffe in Wasser und niederen aliphatischen Alkoholen sowie neue Verbindungen mit verbesserter Löslichkeit
申请人:BAYER AG
公开号:EP0014263A2
公开(公告)日:1980-08-20
Die Erfindung betrifft ein Verfahren zur Verbesserung der Löslichkeit biologisch aktiver Wirkstoffe, das dadurch gekennzeichnet ist, daß man biologisch aktive Wirkstoffe mit OH, NH oder NH2 monofunktionellen hydrophilen Polyathern und organischen Verbindungen mit mindestens 2 gegenüber Zerewitinoff-aktiven Wasserstoffatomen reaktiven Gruppen umsetzt. Sie betrifft ferner neue so hergestellte Verbindungen.
A phosphine sulfide, a manufacturing process therefor and a use thereof
申请人:MITSUI CHEMICALS, INC.
公开号:EP0972776A1
公开(公告)日:2000-01-19
A basic organic compound which is soluble in an organic solvent, does not have problems in its preparation or handling and exhibits catalytic activity as a basic compound, is a phosphine sulfide represented by the (1):
The phosphine sulfide represented by formula (1), is made by reacting one molecule of thiophosphoryl chloride with three molecules of a phosphorane represented by formula (2):
A process for effectively manufacturing a poly(alkylene oxide) involves polymerizing an alkylene oxide in the presence of the above organic compound (phosphine sulfide), or in the presence of the phosphine sulfide and an active hydrogen compound selected from water and organic compounds having a partial structure of -OH or -NH-.
A process for manufacturing a 1,2-dioxyethane derivative from an epoxy compound, i.e. manufacturing a 1,2-dioxyethane derivative involves reacting an epoxy compound with a carboxylate, carboxylic anhydride, carbonate or phenol compound, respectively, in the presence of the phosphine sulfide.
ASYMMETRICAL CARBONATE COMPOUND AND MANUFACTURING METHOD THEREOF
申请人:Ube Industries, Ltd.
公开号:EP2253710A1
公开(公告)日:2010-11-24
This is to provide a process for preparing an asymmetric carbonate compound from a symmetric carbonate compound and an ester compound with good yield, which is simple and easy, and industrially suitable.
Disclosed is a process for prepaing an asymmetric carbonate compound which comprises allowing a symmetric carbonate compound represented by the formula (1) to react with an ester compound represented by the formula (2) in the presence of a hydrolase.