CAS: 2082-59-9; Pentanoic Anhydride

相似化合物

623-65-4 645-66-9 626-29-9

上下游产品

acetic acid valeric acid-anhydride acetic anhydride valeric acid acetyl chloride1-furan-2-yl-pentan-1-one 6-ethyl-3-valeryl-pyran-2,4-dione 3-butylidenephthalide 2,4,6-triiodo-3,5-bis-valerylamino-benzoic acid

正戊酸置于氯化亚砜,Sodium Carbonate体系中,用 1,4-二氧六环,二氯甲烷 用作溶剂,化学反应 2.0H,以87%的收率获得戊酸酐
参考文献:用na2Co3/socl2简单制备对称羧酸酐
标题:用na2Co3/socl2简单制备对称羧酸酐
摘要:摘要 描述了一种使用碳酸钠/亚硫酰氯合成对称羧酸酐的方便和通用的方法.
Doi:10.1080/00397910701547904

专利信息

专利号:US-2008287649-A1
优先权日:2006-12-29
标 题 :Methods for the synthesis of cyclic peptides
发明人：CHEN LIN; HAN YEUN-KWEI; ROBERTS CHRISTOPHER R
权利人:CHEN LIN; HAN YEUN-KWEI; ROBERTS CHRISTOPHER R
摘要:Methods for the synthesis of cyclic peptides are provided, as well as novel dipeptide compounds. The methods include the solid phase synthesis of a dipeptide, which is the coupled to a second peptide in a solid phase reaction. The peptide is then cyclized following the coupling reaction. The methods and dipeptides are particularly useful for the synthesis of MC-4 receptor agonist peptides.

专利号:US-5702928-A
优先权日:1994-07-18
标题 :Process for producing optically active triazole compounds and method of racemizing optically active triazole compounds
发明人：KAWADA NAOKI; YAMAZAKI NORITSUGU; IMOTO TAKAFUMI; IKURA KIYOSHI
权利人:DAICEL CHEM
摘要:PCT No. PCT/JP95/01416 Sec. 371 Date May 24, 1996 Sec. 102(e) Date May 24, 1996 PCT Filed Jul. 17, 1995 PCT Pub. No. WO96/02664 PCT Pub. Date Feb. 1, 1996A process for the asymmetric synthesis of a compound represented by general formula (II-R) easily at a low cost by using a lipase, and a process for producing a compound to be utilized in the above synthesis. (II-R)

专利号:US-6211382-B1
优先权日:1997-07-25
标题 :Process for the preparation of 1,3-diaza-spiro (4.4) non-1-en-4-one derivatives and 1-cyano-1-acylaminocyclopentane intermediates
发明人：HUSZAR CSABA; KIS-TAMAS ATTILA; NEMETH ATTILA; NAD ZSUZSANNA; MAKOVI ZOLTAN; GAJARY ANTAL; KOLLAR ENDRE; ARANYOSI PETER; GYUERE KAROLY; MESZAROS ISTVAN; HARI ZSUZSANNA CSETRIN; SUPIC ATTILA; ZRINYI ILONA DERVALICSNE; DUBOVSZKI KATALIN; PALIN LAJOSNE; KARASH AGNES; BOGNAR ERZSEBET
权利人:SANOFI SYNTHELABO
摘要:Process for the preparation of compounds of formula (I) wherein R means hydrogen atom, or C1-6 alkyl group, or C7-12 aralkyl group or phenyl group, characterised in that a) the compound of formula (III) is reacted with a compound of formula (IV) wherein X means halogen atom or C1-5 alkoxy group or hydroxyl group, and the resulting compound of formula (II) is transformed, in a reaction medium with pH above 7, into the compound of formula (I) or b) the compound of formula (III) is reacted with an anhydride of general formula (V) and the resulting compound of formula (II) transformed, in a reaction medium with pH above 7, into the compound of formula (I), or c) a compound of formula (II) is transformed, in a reaction medium with pH above 7, into the compound of formula (I), and if desired, the resulting compounds of formula (I), before or after isolation, are transformed into acid addition salts, or the compounds of formula (I) are liberated from their acid addition salts. Thus a process for the preparation of intermediates useful in synthesis of angiotensin II antagonists is disclosed.

专利号:US-6239286-B1
优先权日:1997-07-25
标 题:Process for the preparation of 1,3-diaza-spiro (4.4) non-1-en-4-one derivatives and 1-cyano-1-acylamino-cyclopentane intermediates
发明人：KIS-TAMAS ATTILA; HUSZAR CSABA; CASTRO BERTRAND; NEMETH ATTILA; ARANYOSI PETER; GYUERE KAROLY; MESZAROS ISTVAN; ZRINYI ILONA DERVALICSN; DUBOVSZKI KATALIN; PALI LAJOSNE; GAJARY ANTAL; SUPIC ATTILA; NAD ZSUZSANNA; MAKOVI ZOLTAN; KOLLAR ENDRE; HARI ZSUZSANNA CSETRIN; KARASZA GN; BOGNAR ERZSEBET
权利人:SANOFI SYNTHELABO
摘要:Process for the preparation of compounds of formula (I) wherein R means hydrogen atom, or C1-6 alkyl group, or C7-12 aralkyl group or phenyl group, characterised in that: a) the compound of formula (III) is reacted with a compound of formula (IV) wherein X means halogen atom or C1-5 alkoxy group or hydroxyl group and the resulting compound of formula (II) is transformed in the presence of an oxidising agent in a reaction medium with pH above 7, into the compound of formula (I), or b) the compound of formula (III) is reacted with an anhydride of general formula (V) and the resulting compound of formula (II) transformed in the presence of an oxidising agent, in a reaction medium with pH above 7, into the compound of formula (I), or c) a compound of formula (II) is transformed in the presence of an oxidising agent, in a reaction medium with pH above 7, into the compound of formula (I), and if desired, the resulting compounds of formula (I), before or after isolation, are transformed into acid addition salts, or the compounds of formula (I) are liberated from their acid addition salts. Thus a process for the preparation of intermediates useful in synthesis of angiotensin II antagonists is disclosed.

专利号:US-11597741-B2
优先权日:2020-08-13
标 题 :Processes and materials for the synthesis of sugar esters found in natural tobacco
发明人：XING CHENYUE
权利人:MYST LABS INC
摘要:A process and materials method for making a glucose tetraester may include reacting glucose with a carboxylic acid to create a glucose pentaester. The glucose pentaester was reacted with a basic reagent to create a glucose tetraester. Glucose was reacted with a carboxylic acid anhydride in the presence of 4-dimethylaminopyridine to create a glucose pentaester product. The glucose pentaester reaction product was separated. The glucose pentaester reaction product was reacted with a basic reagent, wherein the reaction steps may take place at a temperature of about 0° C. to about 60° C. and about ambient pressure, wherein the ratio of the carboxylic acid to the glucose was from about 5:1 to about 50:1, and wherein the ratio of the glucose pentaester to the basic reagent was from about 1:50 to about 1:150.

专利号:US-2023357257-A1
优先权日:2020-12-28
标 题 :Novel process for the synthesis of noroxymorphone from morphine
发明人：GORBACHEV DMITRY; LAM HON WAI; SAXENA AAKARSH; SAXENA NAVIN SATYAPAL
权利人:NAVIN SAXENA RESEARCH & TECH PVT LTD
摘要:The present invention relates to a novel, efficient, pot- and atom-economical, and industrially applicable process for converting morphine to noroxymorphone using reagents and solvents of lesser toxicity and lower cost with respect to those used in the prior art.