会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明授权
    • Transvinylation of carboxylic acids
    • 羧酸的转化
    • US5223621A
    • 1993-06-29
    • US817194
    • 1992-01-06
    • Jean-Claude VallejosYani Christidis
    • Jean-Claude VallejosYani Christidis
    • C07C67/10
    • C07C67/10
    • Transvinylation process between vinyl acetate or vinyl propionate and a carboxylic acid of general formula (I),RCOOH (I)in which R represents a substituted or non-substituted alkyl, cycloalkyl, aralkyl or aromatic radical, in the presence of a palladium catalyst, in which the catalyst is obtained in situ, by reacting, in the reaction medium, a derivative of palladium chosen from the group constituted by palladium II acetate, nitrate or hydroxide and palladium deposited on charcoal, with a tertiary amine chosen from the group constituted by 2,2'-bipyridyl, orthophenanthroline or tetramethylethylenediamine, that the quantity of palladium used, expressed in gram-atom of palladium II per 100 moles of carboxylic acid of general formula (I) is between 0.005 and 1 and that the quantity of amine is greater than 1 and less than 10 moles per gram-atom of palladium II used and use for the preparation of certain products.
    • 乙酸乙烯酯或丙酸乙烯酯与通式(I)的羧酸,其中R表示取代或未取代的烷基,环烷基,芳烷基或芳族基团的RCOOH(I)在钯催化剂存在下的反应, 其中通过在反应介质中使选自由钯II乙酸酯,硝酸盐或氢氧化物构成的组的钯衍生物和沉积在活性炭上的钯与选自以下组成的组中的叔胺反应获得催化剂: 2,2'-联吡啶基,邻菲咯啉或四甲基乙二胺,使用的钯的量(以每100摩尔通式(I)的羧酸计)钯II的克原子数为0.005〜1,胺的量为 大于1且小于10摩尔/克原子的钯II,并用于制备某些产品。
    • 7. 发明授权
    • Process for preparation of alkanoic acids
    • 链烷酸的制备方法
    • US4515970A
    • 1985-05-07
    • US601221
    • 1984-04-17
    • Yani ChristidisJean-Claude Vallejos
    • Yani ChristidisJean-Claude Vallejos
    • B01J27/00B01J27/06C07B61/00C07C51/00C07C51/347C07C51/353C07C59/52C07C59/56C07C59/64C07C67/00C07D317/60C07D333/24C07C63/36
    • C07D333/24C07C51/347C07D317/60
    • A process for preparation of substituted acetic acids having the general formula I:Ar--CHR--COOH Iin which R is selected from the group consisting in one hydrogen atom and C.sub.1 -C.sub.4 -alkyl radicals, and Ar is selected from the group consisting in radicals of aromatic nature selected from the following radicals: 2-thienyl, 2-methoxy-1-naphthyl, 3,4-methylenedioxy-phenyl, and the substituted phenyls of the general formula II: ##STR1## where R.sub.1 is selected from the group consisting in hydrogen and C.sub.1 -C.sub.4 -alkyl groups, and R.sub.2 is selected from the group consisting in hydrogen, halogen, alkyl, alkoxy and hydroxy-groups, such process comprising the step of reacting under heat in an acid medium, in the presence of red phosphorus and catalytic quantities of iodine or hydriodic acid, an alpha carbonylated carboxylic acid having the general formula III:R--CO--COOH IIIin which R has the same meaning as above with an unsaturated derivative of aromatic nature selected from the group consisting in thiophene, 2-methoxynaphthalene, 1,2-methylenedioxy-benzene, and the substituted aromatic hydrocarbons having the general formula IV: ##STR2## in which R.sub.1, R.sub.2 have the same meanings as above, possibly within a compatible organic solvent.
    • 制备具有通式I的取代乙酸的方法:其中R选自一个氢原子和C 1 -C 4 - 烷基,Ar选自自由基 的芳族性质选自以下基团:2-噻吩基,2-甲氧基-1-萘基,3,4-亚甲二氧基 - 苯基和通式II的取代的苯基:其中R 1选自 由氢和C 1 -C 4烷基组成,R 2选自氢,卤素,烷基,烷氧基和羟基,该方法包括在酸性介质中在加热下,在存在 红磷和催化量的碘或氢碘酸,具有通式III的α羰基化羧酸:R-CO-COOHIII,其中R具有与上述相同的含义的芳族自由基的不饱和衍生物,选自噻吩 e,2-甲氧基萘,1,2-亚甲二氧基苯和具有通式IV的取代芳烃:其中R 1,R 2具有与上述相同的含义,可能在相容的有机溶剂中。
    • 8. 发明授权
    • Preparation process for arylacetic acids and their alkali metal salts
    • 芳基乙酸及其碱金属盐的制备方法
    • US5306833A
    • 1994-04-26
    • US12632
    • 1993-02-03
    • Jean-Claude VallejosYani Christidis
    • Jean-Claude VallejosYani Christidis
    • C07D317/60C07C51/377C07C57/32C07C57/40C07C59/52C07C59/64C07D333/24C07C67/297
    • C07C51/377
    • Process for obtaining an arylacetic acid of general formula (I):Ar--CHR--COOH (I)in which R=H, C.sub.1 -C.sub.4 alk, Ar=2-thienyl, 3-thienyl, 1-naphthyl, 2-naphthyl, 1-(2-methoxy naphthyl), 3,4-methylenedioxy phenyl or phenyl of general formula (II): ##STR1## in which R.sub.1 =H, OH or C.sub.1 -C.sub.4 alkoxy, R.sub.2 =H, C.sub.1 -C.sub.4 alk, C.sub.1 -C.sub.4 alkoxy or OH, as well as their alkali metal salts, by reaction in a solvent of the corresponding arylglycolic acid of general formula (III):Ar-CR(OH)--COOH (III)or one of its alkali metal salts with a hydrogen donor agent chosen from the group constituted by: formic acid, or one of its alkali metal salts, phosphonic acid, phosphinic acid, or one of their alkali metal salts, in the presence of a hydrogen transfer catalyst, which if desired is isolated or salified, and use for the preparation of certain acids of formula (I).
    • 获得通式(I)的芳基乙酸的方法:其中R = H,C 1 -C 4烷基,Ar = 2-噻吩基,3-噻吩基,1-萘基,2-萘基, 1-(2-甲氧基萘基),3,4-亚甲二氧基苯基或通式(II)的苯基:(*化学结构*)(II)其中R1 = H,OH或C1-C4烷氧基,R2 = 通过在相应的通式(III)的芳基乙酸的溶剂中反应:Ar-CR(OH)-COOH(III)或一个或多个其中之一的C 1 -C 4烷基,C 1 -C 4烷氧基或OH,以及它们的碱金属盐 的碱金属盐与选自下组的氢供体试剂:甲酸或其碱金属盐,膦酸,次膦酸或其一种碱金属盐之一在氢转移催化剂存在下 ,如果需要,其分离或成盐,并用于制备式(I)的某些酸。