CAS: 1191-16-8; 3-Methylbut-2-En-1-Yl Acetate

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556-82-1 638-10-8 1516-17-2

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CAS号108-24-7 乙酸酐 | CAS号556-82-1 3-甲基-2-丁烯-1-醇 | CAS号64-19-7 冰醋酸 | CAS号78-79-5 异戊二烯 | CAS号115-18-4 2-甲基-3-丁烯-2-醇 | CAS号25260-60-0 顺-1,4-二乙酰基-2-丁烯 | CAS号115-11-7 2-甲基丙烯 | CAS号503-60-6 1-氯-3-甲基-2-丁烯 | CAS号127-08-2 醋酸钾 | CAS号870-63-3 1-溴-3-甲基-2-丁烯 | CAS号40853-55-2 乙酸-2-异丙基-5-甲基己酯 | CAS号1886-42-6 6-hydroxy-2,2-d... | CAS号5392-40-5 柠檬醛 | CAS号2520-60-7 penten-1-yl cyc... | CAS号7270-50-0 6-METHYL-1,5-HE... | CAS号24253-25-6 3,3-dimethylhex... | CAS号26728-58-5 3-甲基丁-2-烯-1-胺盐酸盐 | CAS号107-86-8 异戊烯醛 | CAS号556-82-1 3-甲基-2-丁烯-1-醇 | CAS号539-52-6 紫苏烯

天然橡胶置于对甲苯磺酸一水合物体系中,用 溶剂黄146 用作溶剂,化学反应生成梨醇酯
参考文献:Methods For Preparing Prenyl Alcohol
标题:Methods For Preparing Prenyl Alcohol
摘要:本发明公开了一种从2-甲基-1,3-丁二烯(异戊二烯)和羧酸制备3-甲基-2-丁烯-1-醇(戊烯醇)的方法.可以在该过程中使用具有相对于水的k.Sub.A大于10.Sup.-4的羧酸,特别是二氯乙酸.该过程涉及将异戊二烯缓慢(例如,滴加)加入羧酸中以形成戊烯酯.在大多数情况下,酯化反应在室温下进行;使用有机碱催化剂,优选为反应物羧酸的钠盐或钾盐,可以提高产率.所得的戊烯酯可以通过与碱反应转化为戊烯醇.戊烯醇可以轻松地转化为柠檬醛,这是合成维生素a和e以及几种广泛使用的类胡萝卜素的化学中间体.

专利信息

专利号:WO-0142264-A1
优先权日:1999-12-10
标 题 :Method for the synthesis of sialylated oligosaccharide donors
发明人：MEHTA SEEMA; GILBERT MICHEL; WAKARCHUK WARREN W; WHITFIELD DENNIS M
权利人:CA NAT RESEARCH COUNCIL; MEHTA SEEMA; GILBERT MICHEL; WAKARCHUK WARREN W; WHITFIELD DENNIS M
摘要:A method for the synthesis of aryl thioglycosides comprising a sialylated residue of β-D-galactose is disclosed. The method consists of preparing by a chemical synthesis a non-sialylated aryl thioglycoside, and enzymatically sialylating the latter with a sialic acid in the presence of a suitable sialyltransferase. The sialylated aryl thioglycoside is then chemically derivatized by standard procedures, to provide a derivative suitable for use as a donor in chemical syntheses of sialylated oligosaccharides. The derivatized sialylated aryl thioglycosides are prepared in high yields, due to reduced number of chemical and purification steps involved in the process. Derivatized aryl thioglycosides useful as building blocks for the synthesis of biologically active sialylated oligosaccharides are also disclosed.

专利号:US-8871975-B2
优先权日:2011-01-05
标题 :Process for the synthesis of agomelatine
发明人：ZARD SAMIR; SIRE BÉATRICE; BOUMEDIENE MEHDI
权利人:ZARD SAMIR; SIRE BÉATRICE; BOUMEDIENE MEHDI; SERVIER LAB
摘要:Process for the industrial synthesis of the compound of formula (I)

专利号:US-9403854-B2
优先权日:2001-03-30
标 题 :Cross-metathesis reaction of functionalized and substituted olefins using group 8 transition metal carbene complexes as metathesis catalysts
发明人：GRUBBS ROBERT H; CHATTERJEE ARNAB K; CHOI TAE-LIM; GOLDBERG STEVEN D; LOVE JENNIFER A; MORGAN JOHN P; SANDERS DANIEL P; SCHOLL MATTHIAS; TOSTE F DEAN; TRNKA TINA M
权利人:CALIFORNIA INST OF TECHN
摘要:The invention pertains to the use of Group 8 transition metal carbene complexes as catalysts for olefin cross-metathesis reactions. In particular, ruthenium and osmium alkylidene complexes substituted with an N-heterocyclic carbene ligand are used to catalyze cross-metathesis reactions to provide a variety of substituted and functionalized olefins, including phosphonate-substituted olefins, directly halogenated olefins, 1,1,2-trisubstituted olefins, and quaternary allylic olefins. The invention further provides a method for creating functional diversity using the aforementioned complexes to catalyze cross-metathesis reactions of a first olefinic reactant, which may or may not be substituted with a functional group, with each of a plurality of different olefinic reactants, which may or may not be substituted with functional groups, to give a plurality of structurally distinct olefinic products. The methodology of the invention is also useful in facilitating the stereoselective synthesis of 1,2-disubstituted olefins in the cis configuration.

专利号:US-2024425890-A1
优先权日:2022-02-11
标 题:Process for the synthesis of alpha-methylene-gamma-butyrolactone
发明人：TADEN ANDREAS; BECK HORST; MYRTOLLARI KAMELA; KOURIST ROBERT; NIGL ANDREA
权利人:HENKEL AG & CO KGAA
摘要:The present application provides a process for the preparation of α-methylene-γ-butyrolactone, said process comprising the steps of:a) acetylating the C1-hydroxyl group of isoprenol to yield isoprenyl acetate;b) forming 4-acetoxy-2-methylene-butan-1-ol from said isoprenyl acetate by whole cell biotransformation, said step comprising:i) contacting a cell (CB) with a culture medium containing said isoprenyl acetate or with a culture medium contiguous with an organic phase containing said isoprenyl acetate under conditions that enable the cell to form 4-acetoxy-2-methylene-butan-1-ol from isoprenyl acetate; and,ii) optionally isolating the resultant 4-acetoxy-2-methylene-butan-1-ol, wherein said cell (CB) exhibits activity of at least one alkane monooxygenase enzyme which catalyzes the formation of 4-acetoxy-2-methylene-butan-1-ol from isoprenyl acetate;c) oxidizing said 4-acetoxy-2-methylene-butan-1-ol to yield 4-acetoxy-2-methylene butyric acid; and,d) converting said 4-acetoxy-2-methylene butyric acid to α-methylene-γ-butyrolactone by hydroxylysis to γ-hydroxy-α-methylenebutyric acid and subsequent cyclization of said γ-hydroxy-α-methylenebutyric acid.

专利号:EP-3748009-A1
优先权日:2019-06-07
标 题 :Synthesis of (r)-pantolactone acetate
发明人：BEKERLE-BOGNER MYRIA; MEDLOCK JONATHAN ALAN; STEINKELLNER GEORG; STROHMEIER GERNOT; STEINER KERSTIN
权利人:DSM IP ASSETS BV
摘要:The present invention relates to a 2-step process comprising step (1) kinetic resolution of R/S-pantolactone using an enantioselective acetylating enzyme and step (2) racemization of (S)-pantolactone in the presence of at least one specific chemical catalyst leading to highly enriched (R)-pantolactone acetate. Both step (1) and (2) might be carried-out in a one-pot reaction/system.

专利号:US-2008200733-A1
优先权日:2005-07-06
标 题 :Processes For The Preparation Of Purified Solanesol, Solanesyl Bromide & Solanesyl Acetone
发明人：UPARE ABHAY; WAGH GANESH; CHAVAN AMIT; JAFRI WAZID SAJJAD; SELVAKUMAR SABAPATHI; ROY MITA
权利人:NICHOLAS PIRAMAL INDIA LTD
摘要:The present invention relates to processes for the preparation of purified solanesol, solanesyl bromide & solanesyl acetone. Solanesyl acetone has the chemical name—all—trans 6,10,14,18,22,26,30,34,38-nonamethyl-5,9,13,17,21,25,29,33,37-triacontanonaen-2-one, of formula 1 and is used for synthesis of coenzyme Q 10 .