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    PRODUCTION OF UNSATURATED KETONE
    92.
    发明专利
    PRODUCTION OF UNSATURATED KETONE 失效

    公开(公告)号：JPH059146A

    公开(公告)日：1993-01-19

    申请号：JP16024491

    申请日：1991-07-01

    Applicant: NIPPON CATALYTIC CHEM IND

    Inventor： SHIMAZAKI YOSHIHARU ,  KANBE HIDEYUKI ,  UEJIMA RIKUO

    IPC: B01J27/18 ,  B01J27/182 ,  B01J27/186 ,  C07B61/00 ,  C07C45/75 ,  C07C49/203 ,  C07C49/213 ,  C07C49/227

    Abstract: PURPOSE:To efficiently produce an unsaturated ketone useful as a perfume, medicine or raw material thereof and a high polymer raw material for photosensitive copolymer from formaldehyde and a ketone in high selectivity without using a mineral acid. CONSTITUTION:Formaldehyde is subjected to dehydrogenation condensation with a ketone expressed by formula I (R and R are H, 1-4C alkyl, phenyl or phenyl in which at least one site of benzene nucleus is replaced by 1-4C alkyl and/or halogen; (n) is 0 or 1) in the presence of a solid catalyst expressed by the formula P1XaOb (X is at least one kind of element selected from alkali metal, alkali earth metal, Y, La, Ce, Pr, Nd, Zr, Nb, B and Si; (a) and (b) are expressed by atomic ratio to P; (a) is 0.5-30; (b) is a number determined by value of (a) in a vapor phase. Thereby the objective unsaturated ketone expressed by formula IIa to formula IIc is obtained stably for long time in extremely high conversion and selectivity, compared with a method using a conventional catalyst.

    PRODUCTION OF 3-HALOGENO-2,3-UNSATURATED KETONE
    93.
    发明专利
    PRODUCTION OF 3-HALOGENO-2,3-UNSATURATED KETONE 失效

    公开(公告)号：JPH04308547A

    公开(公告)日：1992-10-30

    申请号：JP7162091

    申请日：1991-04-04

    Applicant: SHIRATORI PHARM

    Inventor： ISOBE TOSHIO ,  SOEDA YUKIO ,  SAITO MASAAKI ,  SUZUKI SHIGEKO

    IPC: C07C45/63 ,  C07C49/227 ,  C07C49/235 ,  C07C49/255 ,  C07C49/567

    Abstract: PURPOSE:To efficiently obtain a 3-halogeno-2,3-unsaturated ketone useful as an intermediate for medicines and agricultural chemicals in high yield under nearly neutral mild conditions. CONSTITUTION:1,3-Drones expressed by formula 2 (R and R are organic group or R and R together may form a cyclic form) are made to react with a haloiminium salt expressed by formula 1 [R and R are lower alkyl; X is halogen; (n) is 2 or 3], preferably 2-chloro-1,3-dimethylimidazolinium chloride, 2-chloro-1,3-dimethyl-3,4,5,6-tetrahydropyrimidinium chloride, etc., to advantageously afford the objective 3-halogeno-2,3-unsaturated ketone expressed by formula 4.

    UNSATURATED KETONES HAVING TRIFLUOROMETHYL GROUP
    94.
    发明专利
    UNSATURATED KETONES HAVING TRIFLUOROMETHYL GROUP 失效

    公开(公告)号：JPH0377841A

    公开(公告)日：1991-04-03

    申请号：JP21129189

    申请日：1989-08-18

    Applicant: SAGAMI CHEM RES

    Inventor： FUCHIGAMI TAKAMASA ,  HANAMOTO TAKESHI

    IPC: C07C69/675 ,  C07C29/143 ,  C07C33/42 ,  C07C49/227 ,  C07C49/80

    Abstract: NEW MATERIAL:Trifluoromethyl group-containing unsaturated ketones represented by the formula (R is aryl, alkenyl or alkynyl). EXAMPLE:alpha-Trifluoromethylpropiophenone. USE:An intermediate for synthesis of medicines, pesticides, liquid crystal materials, etc. For example, a compound obtained by reduction thereof is used as an intermediate for synthesis of an anti-inflammatory and analgesic agent and a compound prepared by oxidation of the unsaturated bond thereof is used as an intermediate for synthesis of a fluorine-containing amino acid having an antibacterial effect. PREPARATION:For example, 1-phenyl-2-trifluoromethyl-1-propanol is subjected to an oxidative reaction against alcohols using an oxidizing agent consisting of PCC agent composed of a mixture of PCC, Celite, etc., at -78-50 deg.C in a solvent such as anhydrous dichloromethane to obtain the objective compound of the formula.

    Gamma,delta-unsaturated alpha,alpha-dichlorocarbonyl compound and its preparation
    100.
    发明专利
    Gamma,delta-unsaturated alpha,alpha-dichlorocarbonyl compound and its preparation 失效
    GAMMA，DELTA-UNSATURATED ALPHA，ALPHA-DICHLOROCARBONYL化合物及其制备

    公开(公告)号：JPS5748932A

    公开(公告)日：1982-03-20

    申请号：JP12360180

    申请日：1980-09-08

    Applicant: Minoru Sekiya

    Inventor： SEKIYA MINORU ,  MORIMOTO TOSHIAKI

    IPC: C07C47/24 ,  C07C45/00 ,  C07C45/51 ,  C07C49/227 ,  C07C49/80 ,  C07C49/84 ,  C07C67/00

    Abstract: NEW MATERIAL:The compound of formula I (R
    1 is H, alkyl, alkenyl or aryl; R
    2 WR
    4 are H or lower alkyl; provided that R
    1 WR
    4 are not H at the same time).
    EXAMPLE: 2,2,-Dichloro-1-phenyl-4-penten-1-one.
    USE: A synthetic intermediate for the preparation of useful terpene compounds.
    PROCESS: The ether of a 2,2,2-trichloroethyl compound and an allyl compound (formula II) is dehydrochlorinated by reacting in the presence of a base such as potassium tert-butoxide, in a solvent such as tetrahydrofuran, for several hours with or without heating. The objective compound of formula I can be prepared, in high efficiency, by the thermal rearrangement of the resulted ether of 2,2-dichlorovinyl compound and an allyl compound (formula III) at 100W150° for about 30min.
    COPYRIGHT: (C)1982,JPO&Japio

    Abstract translation: 新物质：式I化合物（R 1是H，烷基，链烯基或芳基; R 2 -R 4是H或低级烷基;条件是R 1 -R 4不是 H在同一时间）。 实施例：2,2-二氯-1-苯基-4-戊烯-1-酮。 用途：用于制备有用的萜烯化合物的合成中间体。 方法：将2,2,2-三氯乙基化合物和烯丙基化合物（式II）的醚在碱如叔丁醇钾存在下，在溶剂如四氢呋喃中反应数小时，然后与 或不加热。 式I的目标化合物可以通过在100-150℃下通过所得到的2,2-二氯乙烯基化合物和烯丙基化合物（式III）的醚的热重排以高效制备。 约30分钟

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