专利号:US-7271231-B2 优先权日:1995-01-24 标 题 :Polymerization of olefins 发明人:BROOKHART MAURICE S; JOHNSON LYNDA KAYE; KILLIAN CHRISTOPHER MOORE 权利人:DU PONT 摘要:Disclosed herein are processes for polymerizing ethylene, acyclic olefins, and/or selected cyclic olefins, and optionally selected olefinic esters or carboxylic acids, and other monomers. The polymerizations are catalyzed by selected transition metal compounds, and sometimes other co-catalysts. Since some of the polymerizations exhibit some characteristics of living polymerizations, block copolymers can be readily made. Many of the polymers produced are often novel, particularly in regard to their microstructure, which gives some of them unusual properties. Numerous novel catalysts are disclosed, as well as some novel processes for making them. The polymers made are useful as elastomers, molding resins, in adhesives, etc. Also described herein is the synthesis of linear α-olefins by the oligomerization of ethylene using as a catalyst system a combination a nickel compound having a selected α-diimine ligand and a selected Lewis or Bronsted acid, or by contacting selected α-diimine nickel complexes with ethylene.
专利号:US-8138272-B2 优先权日:2006-05-22 标 题:Preparation of polymer conjugates of therapeutic, agricultural, and food additive compounds 发明人:KONRADI ANDREI W; SMITH JENIFER L 权利人:KONRADI ANDREI W; SMITH JENIFER L; ELAN PHARM INC 摘要:This invention provides an improved synthesis of polymer conjugates of formula (I), n nof agricultural, therapeutic, and food additive compounds. In particular, a process is described for the preparation of conjugates by treating primary or secondary alcohol substituents of active compounds with polymeric nucleophiles using “Mitsunobuâ€? or related reaction conditions.
专利号:US-2024383828-A1 优先权日:2021-07-03 标 题:Process for converting synthesis gas to higher alcohols 发明人:LEITNER WALTER; PRIETO GONZALO; JESKE KAI; VORHOLT ANDREAS JOHANNES; ROESLER THORSTEN; BELLEFLAMME MAURICE 权利人:STUDIENGESELLSCHAFT KOHLE GGMBH; MAX PLANCK GESELLSCHAFT 摘要:The present invention refers to a process for converting a feed gas stream comprising carbon monoxide and hydrogen as major components (synthesis gas) into higher (C 3+ ) alcohols making use of a catalyst combination of a Fischer-Tropsch catalyst and an olefin hydroformylation catalyst. In a second aspect, the invention relates to a Fischer-Tropsch catalyst suitable to be applied in said process.
专利号:US-5218088-A 优先权日:1989-11-02 标 题 :Process for preparing dithiophosphate oligonucleotide analogs via nucleoside thiophosphoramidite intermediates 发明人:GORENSTEIN DAVID; FARSCHTSCHI NASSAR 权利人:PURDUE RESEARCH FOUNDATION 摘要:A method for synthesis of oligonucleotide analogs having dithiophosphate internucleosidic linkages is described. Monohalohydrocarbylthiophosphoramidites are utilized to prepare nucleoside thiophosphoramidite intermediates which are activated for nucleoside coupling with tetrazole catalysts. Sulfur oxidation and dehydrocarbylation of the coupled thiophosphite intermediates provide oligonucleotide analogs having achiral dithiophosphate internucleosidic linkages.
专利号:US-4973679-A 优先权日:1981-03-27 标题:Process for oligonucleo tide synthesis using phosphormidite intermediates 发明人:CARUTHERS MARVIN H; BEAUCAGE SERGE L 权利人:UNIVERSITY PATENTS INC 摘要:A new class of nucleoside phosphoramidites which are relatively stable to permit isolation thereof and storage at room temperature. The phosphoramidites are derivatives of saturated secondary amines.
专利号:US-5530107-A 优先权日:1992-10-15 标 题:Method for making steroidal peracyl glycosides 发明人:ALLAN DOUGLAS J M; BUSCH FRANK R; LAMBERT JOHN F; SHINE RUSSELL J; WALINSKY STANLEY W 权利人:PFIZER 摘要:Processes for the synthesis of tigogenin beta-O-cellobioside heptaalkanoate which is an intermediate for the known hypocholesterolemic agent tigogenin beta-cellobioside. The process comprises reacting α-cellobiosyl bromide heptaalkanoate and β-tigogenin in the presence of zinc fluoride or zinc cyanide under conditions capable of forming said tigogenyl β-O-cellobioside heptaalkanoate. The analogous preparations of hecogenin β-O-cellobioside heptaalkanoate, 11-ketotigogenin β-O-cellobioside heptaalkanoate, and diosgenin β-O-cellobioside heptaalkanoate are also disclosed. The process provides both high β-anomeric selectivity and high yields.
[参考文献]: Yvonne D Williams, Et Al. Triflic Acid-Mediated Rearrangements Of 3-Methoxy-8-Oxabicyclo[3.2.1]Octa-3,6-Dien-2-Ones: Synthesis Of Methoxytropolones And Furans. J Org Chem. 2013 Dec 6;78(23):11707-13.
合成参考文献
摘要:Selt, M.; Waldvogel, S. R., Science of Synthesis: Special Topics, (2021) 1, 274. 摘要:R. Reynaud. Bull. Soc. Chim. France 1970, 4597.