A method for producing a carbonic ester, comprising (1) performing a reaction between an organometal compound having a metal-oxygen-carbon linkage and carbon dioxide to obtain a reaction mixture containing a carbonic ester formed by the reaction, (2) separating the carbonic ester from the reaction mixture to obtain a residual liquid, and (3) reacting the residual liquid with an alcohol to form an organometal compound having a metal-oxygen-carbon linkage and form water and removing the water from the organometal compound, wherein the organometal compound obtained in step (3) is recovered for recycle thereof to step (1).
Process for the preparation of a trifluorovinylsilane, and
申请人:Sagami Chemical Research Center
公开号:US04481366A1
公开(公告)日:1984-11-06
A process for preparing a trifluorovinylsilane represented by the general formula: (CF.sub.2 .dbd.CF).sub.n SiR.sub.4-n (I) where each R independently represents an alkyl group, an aryl group or an aralkyl group, and n is an integer of 1 to 4, which comprises the reaction of chlorotrifluoroethylene with a chlorosilane represented by the general formula: Cl.sub.n SiR.sub.4-n (II) where R and n are as defined above, in the presence of an alkyllithium. Also disclosed is a fluorine-containing polymer represented by the general formula: ##STR1## where each of x and m is an integer other than O, y is an integer including O, and each of R.sup.1, R.sup.2 and R.sup.3 is a lower alkyl group, an aryl group or an aralkyl group, which is prepared by polymerization of a trifluorovinyl silane (I) with active fluoride-ion generating catalyst.
A series of (substituted)ureidoacetohydroxamic acids are useful as inhibitors of Angiotensin I converting enzyme.
一系列(取代)脲乙酰羟肟酸可用作抑制血管紧张素转化酶的抑制剂。
2-Substituted-6-trifluoromethyl purine derivatives with adenosine-A3 antagonistic activity
申请人:Koch Melle
公开号:US20060052331A1
公开(公告)日:2006-03-09
The present invention relates to 2-substituted-6-trifluoromethyl purine derivatives as selective adenosine antagonists, in particular adenosine-A
3
receptor antagonists, to methods for the preparation of these compounds and to novel intermediates useful for the synthesis of said purine derivatives.
The compounds have the general formula (1)
wherein the symbols have the meanings given in the specification.
Fluorinated glucosamine analogs useful for modulating post-translational glycosylations on cells
申请人:——
公开号:US20030148997A1
公开(公告)日:2003-08-07
The present invention provides compositions and methods for inhibiting cell migration, e.g., lymphocytes and inflammation. The invention also provides an improved process for preparing fluorinated N-acetylglucosamines.