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    Process for producing fluorinated polyvalent carbonyl compound
    3.
    发明申请
    Process for producing fluorinated polyvalent carbonyl compound 失效
    制备氟化多价羰基化合物的方法

    公开(公告)号：US20040254396A1

    公开(公告)日：2004-12-16

    申请号：US10891155

    申请日：2004-07-15

    Applicant: ASAHI GLASS COMPANY, LIMITED

    Inventor： Takashi Okazoe ,  Kunio Watanabe ,  Daisuke Shirakawa ,  Masahiro Ito ,  Shin Tatematsu

    IPC: C07C069/63

    CPC classification number: C07C67/14 ,  C07C45/54 ,  C07C51/60 ,  C07C67/287 ,  C07C67/29 ,  C07C67/297 ,  C07C67/307 ,  C07C59/21 ,  C07C53/46 ,  C07C69/63

    Abstract: A fluorinated polyvalent carbonyl compound is produced by an economically advantageous method from inexpensive materials without requiring a complicated synthetic process step. Namely, the present invention comprises reacting a polyvalent alcohol having at least two kinds of alcohol skeletons selected among a primary alcohol, a secondary alcohol and a tertiary alcohol, with an acid halide to obtain a polyvalent ester compound, fluorinating it in a liquid phase to obtain a perfluorinated polyvalent ester compound, and cleaving the ester bonds derived from primary and secondary alcohols in the perfluoropolyvalent ester compound to obtain a fluorinated polyvalent carbonyl compound.

    Abstract translation: 氟化的多价羰基化合物通过经济上有利的方法从便宜的材料制备而不需要复杂的合成工艺步骤。 即，本发明包括使具有选自伯醇，仲醇和叔醇中的至少两种醇骨架的多元醇与酰卤反应，得到多价酯化合物，以液相氟化为 获得全氟化多价酯化合物，并且在全氟聚酯化合物中裂解衍生自伯醇和仲醇的酯键，得到氟化多价羰基化合物。

    Synthesis of racemic 3-fluoro-alanine and its salts
    4.
    发明授权
    Synthesis of racemic 3-fluoro-alanine and its salts 失效
    外消旋3-氟 - 丙氨酸及其盐的合成

    公开(公告)号：US4149012A

    公开(公告)日：1979-04-10

    申请号：US840335

    申请日：1977-10-07

    Applicant: Ulf-H. Dolling ,  Edward J. J. Grabowski ,  Erwin F. Schoenewaldt ,  Meyer Sletzinger

    Inventor： Ulf-H. Dolling ,  Edward J. J. Grabowski ,  Erwin F. Schoenewaldt ,  Meyer Sletzinger

    IPC: C07C59/21 ,  C07C227/08 ,  C07C99/00

    CPC classification number: C07C227/08 ,  C07C59/21

    Abstract: The racemate of 3-fluoro-alanine, and salts thereof, are prepared by reductive amination of 3-fluoro-pyruvic acid, its hydrate, or salts thereof, via the intermediate 2-imino-3-fluoro propionic acid salt, using alkali metal borohydrides as reducing agents. The racemates thus obtained are valuable in the production of 3-fluoro-D-alanine and its pharmacologically acceptable salts, and derivatives thereof, which are potent antibacterial agents.

    Abstract translation: 3-氟 - 丙氨酸的外消旋物及其盐通过使用碱金属通过中间体2-亚氨基-3-氟丙酸盐还原胺化3-氟 - 丙酮酸，其水合物或其盐来制备 硼氢化物作为还原剂。 由此获得的外消旋物在制备作为强效抗菌剂的3-氟-D-丙氨酸及其药理学上可接受的盐及其衍生物中是有价值的。

    Perfluorinated linear polyethers having reactive terminal groups at both ends of the chain and process for the preparation thereof
    6.
    发明授权
    Perfluorinated linear polyethers having reactive terminal groups at both ends of the chain and process for the preparation thereof 失效
    具有链的两端的反应性终端组的全氟化线性聚合物及其制备方法

    公开(公告)号：US3847978A

    公开(公告)日：1974-11-12

    申请号：US83448669

    申请日：1969-06-18

    Applicant: MONTEDISON SPA

    Inventor： SIANESI D ,  CAPORICCIO G ,  MENSI D

    IPC: C07C51/60 ,  C07C59/21 ,  C07C59/315 ,  C08G65/00 ,  C08G65/329 ,  C08G69/42 ,  C07C59/22

    CPC classification number: C08G69/42 ,  C07C51/60 ,  C07C59/21 ,  C07C59/315 ,  C08G65/007 ,  C08G65/329

    Abstract: AT LEAST ONE OF THE LATTER TWO TERMINAL GROUPS BEING PRESENT WHEN-C6F6O- REPEATING UNITS ARE PRESENT, WITH THE FURTHER PROVISO THAT WHEN SAID -CF2CO-CF3 TERMINAL GROUP IS PRESENT, ONE SAID OTHER TWO TERMINAL GROUPS IS ALSO PRESENT, AND THE CORRESPONDING ACYL HALIDES, LOWER ALKYL ESTERS AND METAL SATLS.

    -CF2-COOH, -C(-CF3)-COOH, -CF2-CO-CF3

    TERMINAL GROUP BONDED TO SAID CHAIN THROUGH AN ETHER OXYGEN, SAID POLYETHER HAVING TERMINAL GROUPS BONDED TO SAID CHAIN THROUGH AN ETHER OXYGEN, SAID TERMINAL GROUPS BEING SELECTED FROM THE GROUP CONSISTING OF

    -CF2-CO-CF3

    1. BIFUNCTIONAL PERFLUORINATED POLYETHERS AND MIXTURES THEREOF, HAVING CHEMICALLY REACTIVE TERMINAL GROUPS AT BOTH ENDS OF THE CHAIN, SAID POLYETHER HAVING 1 FROM 1 TO 100 REPEAING UNITS SELECTED FROM THE GROUP CONSISTING OF -C3F6O-, -C2F4O-, AND -CF2O-, WHREIN C2F6 AND C2F4 ARE PERFLUOROALKYLENE UNITS DERIVED FROM THE OPENING OF THE DOUBLE BOND OF A HEXAFLUOROPROPYLENE AND OF A TETRAFLUOROETHYLENE MOLECULE, RESPECTIVELY, THE DIFFERENT OXYPERFLUOROALKYLENE UNITS HAVING A RANDOM DISTRIBUTION ALONG THE CHAIN, THERE BEING NO MORE THAN 50 OFF ANY ONE OF SAID SPECIES OF REPATING UNITS, SAID -CF2OREPEATING UNITS BEING PRESENT ONLY WHEN EITHER OR BOTH OF SAID -C2FF4O- AND C3F6O- REPEATING UNITS ARE PRESENT, SAID -C2F4O -UNITS BEING PRESENT ONLY WHEN SAID -CF2O- UNITS ARE ALSO PRESENT, SAID C3F6O- UNITS BEING PRESENT ONLY WHEN EITHER SAID -CF2O- UNITS ARE ALSO PRESENT OR WHEN SAID POLYETHER CONTAINS A

    Process for synthesizing citric acid
    7.
    发明授权
    Process for synthesizing citric acid 失效
    合成柠檬酸的方法

    公开(公告)号：US3769338A

    公开(公告)日：1973-10-30

    申请号：US3769338D

    申请日：1971-11-09

    Applicant: ETHYL CORP

    Inventor： DAGANI M ,  PEARSON T

    IPC: C07C51/04 ,  C07C51/08 ,  C07C59/16

    CPC classification number: C07C51/04 ,  C07C51/08 ,  C07C59/21 ,  C07C59/265

    Abstract: IT IS DISCLOSED THAT CRITIC ACID AND ITS SALTS ARE PRODUCED BY REACTING A 1-HALO-2-OXO-PROPANE-3-CARBOXYLIC ACID OR A SALT OR ESTER THEREOF WITH CYANIDE TO PRODUCE A 1-HALO-2CYANO-2-HYDROXY-PROPANE-3-CARBOXYLIC ACID OR A SALT OR ESTER THEREOF, THEN CONVERTING THE 1-HALO-2-CYANO-2-HYDROXY-PROPANE-3-CARBOXYLIC ACID, ITS ESTER OR SALT TO A 1HALO-2-HYDROXY-PROPANE-2,3-DICARBOXYLIC ACID OR ITS ESTER OR SALT, THEN CONVERTING THE 1-HALO-2-HYDROXY-PROPANE-2,3DICARBOXYLIC ACID OR ITS ESTER OR SALT TO A PROPANE-2,3EPOXIDE-2,3-DICARBOXYLIC ACID OR ITS ESTER OR SALT, THEN CONVERTING THE PROPANE-1,2-EPOXIDE-2,3-DICARBOXYLIC ACID OR ITS ESTER OR SALT TO A 1-CYANO-2-HYDROXY-PROPANE-2,3DICARBOXYLIC ACID OR ITS ESTER OR SALT, THEN CONVERTING THE 1-CYANO-2-HYDROXY-PROPANE-2,3-DICARBOXYLIC ACID, ESTER OR SALT TO CITRIC ACID OR A SALT OR ESTER THEREOF. OVERALL YIELDS OF CIRTATE FROM DIKETENE ARE 60 PERCENT OR HIGHER.

    Process for the production of {65 -chloroacetoacetic acid esters
    8.
    发明授权
    Process for the production of {65 -chloroacetoacetic acid esters 失效
    生产{65-氯代乙酸酯的方法

    公开(公告)号：US3666793A

    公开(公告)日：1972-05-30

    申请号：US3666793D

    申请日：1969-04-22

    Applicant: LONZA AG

    Inventor： STOCKER AUGUST ,  BOOSEN KARL-JOSEF

    IPC: C07C51/58 ,  C07C67/00

    CPC classification number: C07C51/58 ,  C07C67/46 ,  C07C67/54 ,  C07C59/21 ,  C07C69/716

    Abstract: Esters of gamma -chloroacetoacetic acid may be prepared by reacting diketene and chlorine in the presence of a low boiling organic solvent at temperatures of -10* to - 30* C. and esterifying the reaction product while maintaining the aforementioned temperatures. This process produces yields up to 87 percent of theoretical with product purity of 97 to 98 percent.

    Abstract translation: γ-氯乙酰乙酸的酯可以通过在低沸点有机溶剂存在下，在-10℃至-30℃的温度下使双烯酮和氯反应并在保持上述温度的同时酯化反应产物来制备。 该方法产率高达理论值的87％，产品纯度为97％至98％。

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