CAS: 3902-71-4; Trioxsalen

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📜7-羟基-4,8-二甲基香豆素置于potassium Carbonate,N,N-二乙基苯胺,2,3-二氯-5,6-二氰基-1,4-苯醌体系中,用 丙酮,苯 作为反应溶剂,化学反应 12.0H,反应生成 4,5',8-三甲基]补骨脂素
参考文献:6-或8-烯丙基-7-羟基香豆素的ddq氧化.苯并二吡喃酮和呋喃苯并吡喃酮的新合成
标题:6-或8-烯丙基-7-羟基香豆素的ddq氧化.苯并二吡喃酮和呋喃苯并吡喃酮的新合成
摘要:2H,8H-Benzo[1,2-B:3,4-B']Dipyran-2,8-Diones,2H,8H-Benzo[1,2-B:5,4-B'] 的新合成二吡喃-2,8-二酮,2H-呋喃[2,3-H][1]苯并吡喃-2-酮和7H-呋喃[3,2-G][1]苯并吡喃-7-酮是通过开发获得的2-吡喃酮和呋喃环在香豆素上.6-或 8-Ally-7-羟基香豆素与 2,3-二氯-5,6-二氰基苯醌 (Ddq) 氧化得到苯并二吡喃酮和呋喃苯并吡喃酮.现在合成的化合物的结构是通过分析,光谱和与由已知程序制备的真实样品进行比较来确定的.
DOI:10.1246/bcsj.65.1191

专利信息

专利号:US-10040898-B2
优先权日:2016-08-31
标 题:Method for one-step synthesis of functional polyesters by organic catalysis
发明人：GUO KAI; LIU YIHUAN; ZHU NING; HU XIN; FANG ZHENG; FENG WEIYANG; HUANG WEIJUN
权利人:NANJING UNIVERSITY OF TECHNOLOGY
摘要:It relates to the field of synthetic macromolecular chemistry, and discloses a method for one-step synthesis of thiol-functionalized polyester polyols by organic catalysis. This method uses lactone monomer as reaction raw material, thiol-alcohol as initiator, and diphenyl phosphate as organic catalyst to catalyze and synthesize the thiol-functionalized polyester polyols. The present invention provides a method which is simple, inexpensive, easily controllable and environmentally friendly to prepare thiol-functionalized polyester polyols with the easily available and controllable catalyst. The method can selectively catalyze the ring opening polymerization of lactone to prepare thiol-functionalized polyester polyols using the organic catalyst.

专利号:US-10801033-B2
优先权日:2016-04-05
标题 :Recombinant polynucleotide involved in lactone synthesis and process for synthesis of lactones thereof
发明人：GUPTA VIDYA SHRIKANT; DESHPANDE ASHISH BALWANT; OAK PRANJALI SUDHIR; GIRI ASHOK PRABHAKAR
权利人:COUNCIL SCIENT IND RES
摘要:The present invention provides the polynucleotide encoding enzyme involved in lactone synthesis and a process for synthesis of lactones using said polynucleotides. The invention also provides recombinant plasmid expression vector comprising said polynucleotide sequence. The recombinant protein encoded by said polynucleotides leads to synthesis of lactones having flavour peculiar to Alphonso mangoes.

专利号:US-7326805-B2
优先权日:2003-05-07
标题 :Method for the synthesis of 4-hydroxyisoleucine and the derivatives thereof
发明人：MIOSKOWSKI CHARLES; CATALA CEDRIC; WAGNER ALAIN
权利人:MIOSKOWSKI CHARLES; CATALA CEDRIC; WAGNER ALAIN
摘要:The invention relates to a method for the synthesis of two isomers, at function OH, alone or in mixtures, of amino acids α or the derivatives thereof, having general formula (B), wherein: linkage C—O of the 4-position carbon (represented by symbol) denotes one or other of isomers III or IV, or mixtures thereof. Moreover, R 1 and R 2 represent: a hydrogen atom; or either R 1 or R 2 represents a hydrogen atom and the other substituent is a radical R a , an acyl group —COR a , such as acetyl, or a functional group —COOR a , —SO 2 R a , —N (R a , R b ), R a and R b , which are identical or different, representing a C1-C12 linear or branched alkyl radical, optionally substituted, an aryl group with one or more aromatic rings and heterocycles, comprising between 5 and 8C, optionally substituted, or aralkyl, the alkyl substituent and the aryl group being as defined above; or R 1 and R 2 both represent a substituent as defined above. R 3 represents a hydrogen atom or R a and R 4 has the significance of R a . The invention is characterised in that it comprises: the isomerisation of a compound having formula (I), wherein R 1 , R 2 , R a , R 3 and R 4 are as defined above, such as to produce a compound having formula (II); and the reduction of the carbonyl function thereof which, depending on the catalytic system employed and the formula (I) compound used, produces one of the isomers having general formula (III) or (IV) or a mixture thereof having formula (B). The invention can be used for the synthesis of (2S, 3R, 4S)-4-hydroxyisoleucine.

专利号:US-4451565-A
优先权日:1981-03-10
标 题:Enzyme-mediated synthesis of esters and lactones
发明人：GATFIELD IAN; SAND THEODOR
权利人:HAARMANN & REIMER GMBH
摘要:In the enzyme-mediated synthesis of an ester or lactone from at least one carboxylic acid of the formula R-CH2-CH2-COOH wherein R is a hydrogen atom, or a hydrocarbon radical which has 1 to 21 carbon atoms and which can be optionally substituted by hydroxyl groups or alkoxy groups with 1 to 10 carbon atoms, with at least one primary or secondary alcohol having 1 to 15 carbon atoms, the improvement which comprises employing as the enzyme the esterase from Mucor miehei and effecting the synthesis in the absence of water. Advantageously, the synthesis is effected at about room temperature, the mol ratio of carboxylic acid to alcohol is from about 1:1 to 1:1.1, and the enzyme is used in a quantity of about 3 to 20% by weight of the carboxylic acid. The absence of water facilitates recovery, as by distillation.

专利号:US-4346039-A
优先权日:1981-03-19
标 题 :Synthesis of ochratoxins
发明人：KRAUS GEORGE A
权利人:UNIV IOWA STATE RES FOUND INC
摘要:A simple, direct synthesis route is provided for Ochratoxin compounds, particularly Ochratoxin A, Ochratoxin B, and Ochratoxin C. The reaction involves treating the dimethyl ester of 2-hydroxy-4-methylbenzene-1,3-dioic acid with a deprotonating agent, followed by addition of acetaldehyde, to provide a precursor compound, which can conveniently be converted to Ochratoxins A, B or C. The synthesis route allows for the first time laboratory and industrial scale synthesis of ochratoxins A, B and C in large quantities and pure form making them available as toxins, for use as anti-toxin investigation works, and for biological activity investigations and residue studies.

专利号:US-8598346-B2
优先权日:2008-07-16
标 题 :Synthesis of cyclic amidines
发明人：LENTZEN GEORG; NEUHAUS THORSTEN
权利人:LENTZEN GEORG; NEUHAUS THORSTEN; BITOP AG
摘要:The invention relates to an innovative method for synthesis of cyclic amidines. The synthesis starts from a β-, γ- or δ-lactone which is twofold brominated. After esterification of the carboxyl function, the bromine atoms are nucleophilically substituted and the corresponding diamino compound is obtained. The ring closure to the cyclic amidine is accomplished subsequently by reaction with orthoester, imidate or thioimidate. Owing to interposing additional steps for recovery of the diamino compound in enantiomerically pure form, the enantiomers of the cyclic amidines can be stereoselectively synthesized.