2,3-取代的 4-氯-2-环丁烯酮,由取代的环丁烯二酮的区域特异性转化制备,经过钯催化与乙烯基和芳基锡烷以及乙烯基锆试剂交叉偶联,形成 4-R unsat -2-环丁烯酮。在热解 (100 o C) 时,这些底物以高产率转化为取代的苯酚。使用这种化学方法以区域特异性方式制备了五取代的芳香族化合物和各种三取代和四取代的芳香族化合物
[EN] CARBIDOPA PRODRUGS AND USES THEREOF<br/>[FR] PROMEDICAMEMTS DE CARBIDOPA ET LEURS UTILISATIONS
申请人:XENOPORT INC
公开号:WO2004052841A1
公开(公告)日:2004-06-24
Prodrugs of carbidopa, derivatives of carbidopa prodrugs, methods of making prodrugs of carbidopa and derivatives thereof, methods of using prodrugs of carbidopa and derivatives thereof, and compositions of prodrugs of carbidopa and derivatives thereof are disclosed.
An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene. The present invention discloses a process for producing an isocyanate by subjecting a carbamic acid ester to a thermal decomposition reaction, including the steps of: recovering a low boiling point component in a form of a gaseous phase component from a thermal decomposition reaction vessel in which the thermal decomposition reaction is carried out; recovering a liquid phase component containing a carbamic acid ester from a bottom of the thermal decomposition reaction vessel; and supplying all or a portion of the liquid phase component to an upper portion of the thermal decomposition reaction vessel.
PROCESS FOR PRODUCING ISOCYANATES USING DIARYL CARBONATE
申请人:Shinohata Masaaki
公开号:US20110054211A1
公开(公告)日:2011-03-03
An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene. The present invention provides an isocyanate production process including the steps of: obtaining a reaction mixture containing an aryl carbamate having an aryl group originating in a diaryl carbonate, an aromatic hydroxy compound originating in a diaryl carbonate, and a diaryl carbonate, by reacting a diaryl carbonate and an amine compound in the presence of a reaction solvent in the form of an aromatic hydroxy compound; transferring the reaction mixture to a thermal decomposition reaction vessel; and obtaining isocyanate by applying the aryl carbamate to a thermal decomposition reaction, wherein the reaction vessel in which the reaction between the diaryl carbonate and the amine compound is carried out and the thermal decomposition reaction vessel for the aryl carbamate are different.
[EN] POLYSUBUNIT OPIOID PRODRUGS RESISTANT TO OVERDOSE AND ABUSE<br/>[FR] PROMÉDICAMENTS D'OPIOÏDES À SOUS-UNITÉS MULTIPLES RÉSISTANTS AUX SURDOSES ET AUX ABUS
申请人:ELYSIUM THERAPEUTICS INC
公开号:WO2018170465A1
公开(公告)日:2018-09-20
The invention provides compositions and methods for the treatment or prevention of pain. Compositions provided are resistant to overdose and abuse. Compositions provided comprise two or more different molecules, where each molecule comprises at least one GI enzyme-labile opioid agonist releasing subunit comprising an opioid agonist that is covalently linked to at least one GI enzyme inhibitor subunit.
POLYSUBUNIT OPIOID PRODRUGS RESISTANT TO OVERDOSE AND ABUSE
申请人:Elysium Therapeutics, Inc.
公开号:US20170100390A1
公开(公告)日:2017-04-13
The invention provides compositions and methods for the treatment or prevention of pain. The invention provides constructs whereby hydrolysis of the construct by a specified gastrointestinal enzyme directly, or indirectly, releases an opioid when taken orally as prescribed. The gastrointestinal enzyme mediated release of opioid from constructs of the invention is designed to be attenuated in vivo via a saturation or inhibition mechanism when overdoses are ingested. The invention further provides constructs that are highly resistant to oral overdose, chemical tampering, and abuse via non-oral routes of administration.