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    Process for the continuous production of pseudoionones
    4.
    发明授权
    Process for the continuous production of pseudoionones 失效
    连续生产PSEUDOONONES的工艺

    公开(公告)号：US3745189A

    公开(公告)日：1973-07-10

    申请号：US3745189D

    申请日：1969-09-15

    Applicant: BASF AG

    Inventor： HOFFMANN W ,  PASEDACH H ,  FISCHER R

    IPC: C07C45/68 ,  C07C49/20 ,  C07C49/24

    CPC classification number: C07C45/68 ,  C07C49/203

    Abstract: PRODUCING OF PSEUDOIONONES HAVING THE GENERAL FORMULA: CH3-C(CH3)=CR2-A;

    CH2=C(CH3)-CHR2-A

    AND R3OC(CH3)2-CHR2-A BY REACTION OF DEHYDROLINALOOLS CH3-C(CH3)=CR2-B;

    CH=C(CH3)-CHR2-B

    AND R3OC(CH3)2-CHR2-B WITH AN ACETOACETIC ESTER CH3-CO-CHR1-COOR3 (WITH A DENOTING -CH2-CH2-C(CH3)=CH-CH=CHR1-CO-CH3; B DENOTING -CH2-CH2-C(CH3)(OH)-C=CH; R1 AND R2 DENOTING H OR CH3; AND R3 DENOTING AN ALKYL GROUP) BY CONTINUOUS REACTION IN AT LEAST TWO VESSELS ARRANGED IN SERIES THE RESIDENCE TIMES IN THE VESSELS BEING ABOUT EQUAL AND THE REACTION TEMPERATURES RISING IN EACH CASE BY FROM 1* TO 50*C. FROM VESSEL TO VESSEL, THE TEMPERATURE IN THE FIRST VESSEL BEING FROM 160* TO 190*C. THE PRODUCTS ARE VALUABLE PERFUMES AND INTERMEDIATES FOR THE SYNTHESIS OF COMPOUNDS OF THE VITAMIN-A AND CAROTENOID SERIES.

    5.
    发明专利
    未知

    公开(公告)号：GB1258963A

    公开(公告)日：1972-01-05

    申请号：GB1258963D

    申请日：1969-03-07

    Applicant: BASF AG

    Inventor： ARNOLD L ,  PASEDACH H ,  POMMER H

    IPC: C07C39/07 ,  C07C45/67 ,  C07C45/74 ,  C07C49/603

    Abstract: 1,258,963. Trimethyl - 2 - cyclohexen -1 -ones. BADISCHE ANILIN- & SODA-FABRIK A.G. 7 March, 1969 [8 March, 1968; 26 July, 1968], No. 12117/69. Heading C2C. In a process for the production of a trimethyl - 2 - cyclohexen - 1 - one diethyl ketone is reacted in the presence of a basic reagent either (a) with crotonaldehyde or a compound which in the presence of a basic reagent is converted into crotonaldehyde, thereby yielding 2,5,6 - trimethyl - 2 - cyclohexen - 1 - one, or (b) with methyl vinyl ketone or a compound which in the presence of a basic reagent is converted into methyl vinyl ketone, thereby yielding 2,3,6 - trimethyl - 2 - cyclohexen- 1-one. 4 - Methyl - 3 - ethyl - 2 - cyclohexen- 1-one formed as a by-product is isomerized to 2,3,6 - trimethyl - 2 - cyclohexen - 1 - one by treatment with an aqueous base. 2,3,6 - Trimethylphenol is obtained by dehydrogenation of either 2,5,6- or 2,3,6-trimethyl-2-cyclohexen- 1-one produced by the above processes. The dehydrogenation is carried out by heating the cyclohexenones with sulphur, selenium or chloranil or in the presence of metals such as iron, cobalt, nickel, rhodium, platinum, palladium, copper and silver. Numerous compounds are specified which form crotonaldehyde or methyl vinyl ketone in the presence of a basic reagent.

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