CAS: 3393-45-1; 5,6-Dihydro-2H-Pyran-2-One

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2381-87-5 5926-95-4 72649-02-6

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Delta-戊内酯 在 三氟甲磺酸二丁硼,N,N-二异丙基乙胺,Dichloro( 1,5-Cyclooctadiene)Platinum(Ll),碳酸二稀丙酯,Silver Trifluoroacetate体系中,用 氟苯,二氯甲烷作为反应溶剂,反应 24.0H,以70%的收率获得5,6-Dihydro-Pyran-2-One
参考文献:铂催化内酰胺,酮和内酯的去饱和
标题:铂催化内酰胺,酮和内酯的去饱和
摘要:据报道,一般的铂催化的n保护的内酰胺,酮和内酯与其共轭的α,β-不饱和对应物的去饱和反应.该反应在室温或50°c的弱酸性条件下进行.它具有可扩展性,并可以容纳各种功能组.碘化物,溴化物和含硫底物的有效转化证明了与钯催化的去饱和反应的互补反应性.
Doi:10.1002/Anie.201811197

专利信息

专利号:US-7964743-B2
优先权日:2005-02-17
标 题:Catalyst for asymmetric synthesis, ligand for use therein, and process for producing optically active compound through asymmetric synthesis reaction using them
发明人：MIYAURA NORIO; YAMAMOTO YASUNORI
权利人:JAPAN SCIENCE & TECH AGENCY
摘要:Compounds represented by the following general formula (1a) or (1b). n nA complex comprising a center metal of rhodium and a compound represented by the following general formula (1a) or (1b) as a ligand. A catalyst for optically active beta-substituted carbonyl compound synthesis and catalyst for asymmetric 1, 2 addition reaction being composed of the complex. A method of production of an optically active beta-aryl compound from an alpha, beta-unsaturated compound and an aryl-boronic acid derivative and method of production of an optically active aryl alcohol compound from an aldehyde compound and aryl boronic acid derivatives using the catalyst. A complex comprising a center metal of palladium and a compound represented by the following general formula (1a) or (1b) as a ligand. A catalyst for asymmetric allylic substitution reaction being composed of the complex. A method of production of an optically active dialkyl (1,3-disubstituted propeny)malonate compound from a 1,3-disubstituted ally acetate compound and a dialkyl malonate and method of production of an optically active allylamine compound from a 1,3-disubstituted ally acetate compound and an amine compound. The compounds have not only the versatility of being usable in the synthesis of wide-ranging optically active aryl compounds but also the selectivity and reactivity permitting synthesis with high yield within a short period of time under industrially advantageous mild conditions.

专利号:US-2004110957-A1
优先权日:2002-12-05
标 题 :Process for the synthesis of an antiviral compound
发明人：WILKEN JOERG; NERENZ FRANK; KANSCHIK-CONRADSEN ANDREAS
权利人:HONEYWELL INT INC
摘要:In a process comprising synthesizing pyranes including [R—(R*,R*)]-N-[3-[1-[5,6-dihydro-4-hydroxy-2-oxo-6-(2-phenylethyl)-6-propyl-2H-pyran-3-yl]propyl]phenyl]-5-(trifluoromethyl)-2-pyridinesulfonamide the present invention comprises the improvements comprising: (a) providing a racemic mixture of 3-hydroxy-3-(2-phenylethyl)-hexanoate ethyl acetate by reacting said 1-phenyl-hexan-3-one with ethylbromoacetate under Reformatsky conditions; and (b) separating (R)-3-hydroxy-3-(2-phenylethyl)-hexanoic acid in enantiomeric excess by saponification and reverse resolution of the racemate of step (a) to produce a resolved product. In addition, the present invention comprises a reverse resolution process for separating an enantiomer from a mixture of enantiomers.

专利号:US-9090545-B2
优先权日:2011-10-14
标 题 :Asymmetric synthesis of organic compounds
发明人：FLETCHER STEPHEN P; MAKSYMOWICZ REBECCA M; ROTH PHILIPPE M C
权利人:ISIS INNOVATION
摘要:The present invention provides processes for the production of chiral compounds in a stereoisomeric excess. The present processes involve reacting a hydrometallated alkene compound with a compound comprising a conjugated-bond system under conditions such that the compounds undergo an asymmetric 1,4- or 1,6-conjugate addition reaction, generating a chiral compound in a stereoisomeric excess. The reaction is performed in the presence of a metal catalyst, which catalyst preferably comprises a non-racemic chiral ligand.

专利号:US-11708320-B2
优先权日:2018-06-29
标 题:Environmentally-friendly hydroazidation of olefins
发明人：XU HAO
权利人:UNIV GEORGIA STATE RES FOUND
摘要:The present invention provides processes for the synthesis of organic azides, intermediates for the production thereof, and compositions related thereto.

专利号:US-5146005-A
优先权日:1989-10-06
标 题 :Cationically curable oxalkylene ethers, method for their synthesis and their use as casting compounds, coating compositions or as reactive diluents for epoxide resins
发明人：WEITEMEYER CHRISTIAN; DOEHLER HARDI
权利人:GOLDSCHMIDT AG TH
摘要:New, cationically curable oxyalkylene ethers and the synthesis thereof are disclosed. The oxyalkylene ethers, are of the general, average formula wherein R1 is an n-valent residual group derived from a compound (R1)Hn from which n active hydrogen atoms have been split off and is capable of entering into an addition reaction with oxiranes, or a univalent alkyl or aryl group, and n>/=1; R2 is a hydrogen, hydrocarbon or R3OCH2- group; R3 and R4 are each hydrogen, hydrocarbon or acyl groups, and R1, R2, R3 and R4 may have different meanings in the molecule; R5, R6 and R7 are each hydrogen or alkyl groups with 1 to 8 carbon atoms, or R5 and R7, or R6 and R7 together are a constituent of a cyclic, non-aromatic hydrocarbon group with 5 or 6 carbon atoms; m is at least 1 and at most n; x is the average molecule=3 to 100, and y in the average molecule=0 to 100, provided that 3
专利号:WO-2012173504-A2
优先权日:2011-06-15
标 题 :Method for synthesis of the substituted azetidinones and intermediates for their synthesis