专利号:US-4707554-A 优先权日:1984-12-07 标 题 :Method of obtaining derivatives of 4β-/1'-alken-1'-yl/-2ξ,5α-dαβ-4,5,6,6α.beta. 发明人:ACHMATOWICZ BARBARA; DANIEWSKI ANDRZEJ R; MARCZAK STANISLAW; PANKOWSKI JACEK; WICHA JERZY 权利人:POLSKA AKADEMIA NAUK INSTYTUT 摘要:A new method has been disclosed for obtaining derivatives of 4β-/1'-alken-1'-yl/-2ξ,5â•?-dihydroxy-3,3aβ,4,5,6,6aβ-hexahydro-2H-cyclopenta [b] furane useful in the synthesis of prostaglandins or their analogs, and a method for obtaining new sulphonyl initial compounds of the general formula 4, in which Z denotes a hydrogen atom or a protective group, Y denotes a group of the formula â•?CHOZ 1 , in which Z 1 has the meaning stated for Z, whereby protective groups Z and Z 1 may be the same or different, and Ar denotes optionally a substituted aryl group. n In the method according to the invention the new sulphonyl derivative of the general formula 4 is alkylated with an electrophilic agent comprising: carbonyl derivatives, oxiranes and halohydrins or their derivatives; the alkylation product is transformed into derivatives of 4β-/1'-alken-1'-yl/-2ξ,5α-dihydroxy-3,3aβ,4,5,6,6a.beta.-hexahydro-2H-cyclopenta[b] furane in reactions which ensure obtaining a double bond C 13 -C 14 . n New sulphonyl initial compounds of the general formula 4 are obtained from lactone of the general formula 11, in which Z has the above stated meaning and L° denotes a leaving group, which is transformed into a sulphide; the obtained lactone-sulphide is reduced to lactol, and thereafter lactol-sulphide is oxidized to te sulphonyl derivative.
专利号:US-6177087-B1 优先权日:1994-06-24 标 题:Non-antigenic amine derived polymers and polymer conjugates 发明人:GREENWALD RICHARD B; MARTINEZ ANTHONY; PENDRI ANNAPURNA 权利人:ENZON INC 摘要:Substantially non-antigenic polymers containing pI and/or pH optimum modulating moieties are disclosed. The polymers are useful as intermediates for synthesis of amine-based polymers and in the formation of activated polymers for conjugation with nucleophiles. Conjugates and methods of preparation and treatment with the conjugates are also disclosed.
专利号:US-8946466-B2 优先权日:2010-05-18 标 题 :Method for producing polyether carbonate polyols 发明人:Gürtler Christoph; Hofmann Jörg; WOLF AUREL; GRASSER STEFAN 权利人:Gürtler Christoph; Hofmann Jörg; WOLF AUREL; GRASSER STEFAN; BAYER IP GMBH 摘要:The present invention relates to a process for the preparation of polyether carbonate polyols from one or more H-functional starter substances, one or more alkylene oxides and carbon dioxide in the presence of at least one double metal cyanide catalyst, wherein the cyanide-free metal salt, the metal cyanide salt or both the mentioned salts used for the preparation of the double metal cyanide catalyst contain(s) from 0.3 to 1.8 mol base equivalents (based on 1 mol of the metal cyanide salt used for the synthesis of the catalyst) of alkaline metal hydroxide, metal carbonate and/or metal oxide.
专利号:WO-2024153757-A1 优先权日:2023-01-19 标 题 :Controlled addition of ligand in polyol synthesis 发明人:BLANCO GONZÃ?LEZ MarÃa Dolores; DUEÑAS DÃ?EZ MARTA; FRAGA TRILLO LUISA MARÃ?A; GARCÃ?A RUIZ MÓNICA; CARAZO ANGULO JOSÉ ANTONIO; MIRANDA LÓPEZ-MARÃ?N JUAN DE DIOS 权利人:REPSOL SA 摘要:The present invention relates to a process for the alkali metal base-catalyzed preparation of polyols comprising oxyalkylene units, comprising the addition of a ligand for chelating said alkali metal over a total period of time t ≥ 5 min during the reaction time, to a polyol comprising oxyalkylene units, and to the use of said polyol.
专利号:EP-0468840-A2 优先权日:1990-07-06 标 题:Process for the selective epoxidation of unsaturated (meth)acrylates, new functional (meth)acrylates so obtained and their use in the synthesis of new polymers
专利号:CN-113333019-A 优先权日:2021-04-29 标题:A kind of method for catalyzing synthesis of organophosphorus flame retardant by Lewis acid ionic liquid
摘要:Wohlgemuth, R., Science of Synthesis: Biocatalysis in Organic Synthesis, (2015) 2, 542. 摘要:Wohlgemuth, R., Science of Synthesis: Biocatalysis in Organic Synthesis, (2015) 2, 541. 摘要:Vicens, L.; Borrell, M.; Costas, M., Science of Synthesis: Catalytic Oxidation in Organic Synthesis, (2017) 1, 135.