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    1.
    发明专利
    未知

    公开(公告)号：DE3010504A1

    公开(公告)日：1981-10-01

    申请号：DE3010504

    申请日：1980-03-19

    Applicant: BASF AG

    Inventor： HORNER MICHAEL DIPL CHEM DR ,  NISSEN AXEL DIPL CHEM DR

    IPC: C07D311/72 ,  B01J27/08 ,  C07B61/00 ,  C07D311/58 ,  C07D311/70

    Abstract: 2-Hydroxyalkylchromans (I) I where R1, R2, R3 and R4 are each H or C1-C8-alkyl, R' is H or an organic radical which can be split off hydrolytically or hydrogenolytically as R'-OH or R'-COOH, and m is 1, 2 or 3, are prepared by reacting a hydroquinone II II (a) with an alkenediol IIIa IIIa or (b) with an alkenediol IIIb IIIb or (c) with an alkenediol IIIc IIIc where R4' is a radical which during the condensation with II is converted to the radical R4, at from -50 DEG C. to 120 DEG C., in an inert solvent, in the presence of from 10 to 300 mole %, based on II, of a Lewis acid or of an adduct of a Lewis acid with a Lewis base which has a lower basicity than compound II.

    Ketones prepd. from aldehydes, ketones and hydrogen - using catalyst contg. rare earth cpd. and group eight metal
    9.
    发明专利
    Ketones prepd. from aldehydes, ketones and hydrogen - using catalyst contg. rare earth cpd. and group eight metal 未知

    公开(公告)号：DE2615308A1

    公开(公告)日：1977-10-13

    申请号：DE2615308

    申请日：1976-04-08

    Applicant: BASF AG

    Inventor： NISSEN AXEL DIPL CHEM DR ,  WOERZ OTTO DIPL CHEM DR ,  HEILEN GERD DIPL CHEM DR ,  FLIEGE WERNER DIPL CHEM DR ,  WITTWER ARNOLD DIPL CHEM DR

    IPC: B01J23/63 ,  B01J23/83 ,  C07C45/73 ,  C07C45/74 ,  C07C49/00

    Abstract: A process for the prepn. of higher ketones of formula: R'CH2CH2COR2 comprises the reaction of an aldehyde of formula (I): R1-CHO with ketones of formula (II) CH3COR2 at 80-280 degrees C in the presence of hydrogen and a catalytic system, which contains an oxide or salt of a rare earth metal or mixts. of these and one or more Group VIII metals. In the above, R' is 1-20C alkyl, esp. 1-5C), aryl or cycloalkyl opt. substd. by alkyl, or 7-20C (pref. 7-10 C) aralkyl; the above gps. may also be substd. by OH or alkoxyl gps. inert to the reaction conditions; R2 is the same as R'. Typical cpds. are methyl isoamyl ketone used as a solvent and intermediate and 4-phenyl-butan-2-one used in perfumery. As a result of the catalyst which favours both the condensation and hydrogenation steps, the process is more selective, simpler, cheaper and gives higher yields compared with previous processes. Using acetone and methyl propanol, the catalyst is 10% Ni, 10% Co, 10% rare earth oxides (95% Nd2O3) on an alumina support giving a mixture contg. 40.8% starting materials and 34.3% 5-methylhexane-2-one. The pref. reaction temp. is 140-220 degrees C.

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