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专利号:WO-2023233371-A1
优先权日:2022-06-03
标 题:A continuous flow process for synthesis of organic azides
发明人:GNANAPRAKASAM BOOPATHY; PANDEY AKANKSHA M; MONDAL SHANKHAJIT
权利人:INDIAN INSTITUTE OF SCIENCE EDUCATION AND RES PUNE IISER PUNE
摘要:The present disclosure relates generally to the field of synthetic organic chemistry. More specifically, the disclosure is directed to a continuous flow process for synthesis of azides from alcohols and peroxides, wherein the process comprises azidation with trimethylsilyl azide and a catalyst Amberlyst-15. It is a non-hazardous, mild and controlled reaction giving good yields of azides. The azides can be further employed for synthesis of medicinally and industrially useful chemicals.
专利号:US-2005192445-A1
优先权日:2004-03-01
标题:Semi-synthesis of taxane intermediates and aziridine analogues and their conversion to paclitaxel and docetaxel
发明人:NAIDU RAGINA
权利人:PHYTOGEN LIFE SCIENCES INC
摘要:A process is provided for the semi-synthesis of taxane intermediates and aziridine analogues of cephalomannne and baccatin III intermediates, and the conversion of such intermediates and analogues to paclitaxel and docetaxel.
专利号:US-5286901-A
优先权日:1990-03-09
标题:Prescursors for and synthesis of mono- and difunctionalized acetylenes and difunctional 1,3-diynes
发明人:STANG PETER J; CRITTELL CHARLES M; WILLIAMSON BOBBY L; ZHDANKIN VIKTOR
权利人:UNIV UTAH RES FOUND
摘要:Precursors and methods for the synthesis of mono- and difunctionalized acetylenes are described. The invention includes novel tricoordinate iodonium transfer reagents and novel alkynyldi(phenyliodonium) salts, both of which are precursors for the functionalized acetylenes. The iodonium transfer reagents take the general form of mixed iodonium sulfonates PhI + (X)OSO 2 R f , where X may be OAc, NHAc, NCO, or CN. These mixed iodonium sulfonates are produced by reaction of iodosobenzene with certain substituted trimethylsilanes. n To make the alkynyldi(phenyliodonium) salt PhI + C.tbd.CI + Ph•2 R f SO 3 - ,a mixed iodonium sulfonate is reacted with a bistin acetylene of the kind R' 3 SnC.tbd.CSnR' 3 . Alternatively, the reaction may be performed with disubstituted tin diacetylenes to produce PhI + C.tbd.C-C.tbd.CI + Ph•2 R f SO 3 - to produce a dialkynyldi(phenyliodonium) salt. Subsequent reaction of a nucleophile with the alkynyldi(phenyl-iodonium) salt or dialkynyldi(phenyliodonium) salt produces a difunctional acetylene or a difunctional 1,3-diyne, respectively.
专利号:US-4769497-A
优先权日:1986-07-04
标题:Process for the synthesis of 2,2-dialkoxy-propanes
发明人:MESSINA GIUSEPPE; MORETTI MARIO D; SANNA GAVINO; SANNA SALVATORE R; SOMA GIOVANNI
权利人:ENICHEM ANIC SPA
摘要:A new method of synthesis of a 2,2-dialkoxy-propane e.g. 2,2-dimethoxy-propane, is described through reaction of a cyclic ketal, e.g. 2,2-dimethyl-(1,3)-dioxolane, with a boric acid alkyl ester, e.g. boric acid trimethyl ester, in the presence of an acidic catalyst. The reaction may be carried out either in liquid or in vapour phase. In the latter case, heating of the thus obtained intermediate mixture to the reflux temperature should follow the catalytic step.
专利号:US-7951961-B2
优先权日:2006-07-07
标题:Enantioselective synthesis of pyrrolidines substituted with flavones, and intermediates thereof
发明人:SIVAKUMAR MEENAKSHI; SHUKLA MANOJ; JADHAV PRAMOD KUMAR; BORHADE AJIT
权利人:PIRAMAL LIFE SCIENCES LTD
摘要:The present invention relates to an enantioselective synthesis of (+)-trans enantiomer of pyrrolidines substituted with flavones, represented by Formula 1 or salts thereof, which are inhibitors of cyclin dependant kinases and can be used for treatment of proliferative disorders such as cancer n nwherein Ar has the meaning as indicated in the claims.
专利号:US-7723539-B2
优先权日:2004-06-16
标题:Catalysts based on metal complexes for the synthesis of optically active chrysanthemic acid
发明人:CARLONI SILVIA; BORZATTA VALERIO; MORONI LENI; TANZI GIADA; SARTORI GIOVANNI; MAGGI RAIMONDO
权利人:ENDURA SPA
摘要:Catalysts are described based on metal complexes derived from optically active s compounds, chosen from the classes consisting of bisoxazolines and salicylaldimines supported on an organic or inorganic matrix and employed in particular for the synthesis of optically active chrysanthemic acid.