5.
    发明专利
    未知

    公开(公告)号:ES2164159T3

    公开(公告)日:2002-02-16

    申请号:ES95925847

    申请日:1995-07-08

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP95/02660 Sec. 371 Date Jan. 21, 1997 Sec. 102(e) Date Jan. 21, 1997 PCT Filed Jul. 8, 1995 PCT Pub. No. WO96/02484 PCT Pub. Date Feb. 1, 1996A process for the preparation of acyloins of the general formula I (I) in which Ra and Rb are the same or different and stand for hydrogen or an optionally substituted C1-C20alkyl, an optionally substituted C6-C10aryl, an optionally substituted C7-C12aralkyl, an optionally substituted heteroaryl, or an optionally substituted heterocycloalkyl group, except for autocondensation products of formaldehyde, wherein an aldehyde of the formula IIRaCHO,(II)is reacted, in the presence of a catalyst, with an aldehyde of the formula IIIRbCHO,(III)in which Ra and Rb have the above meanings and at least one of the radicals Ra and Rb denotes a radical other than hydrogen, which have been produced, with the assistance of an auxiliary base, from a triazolium salt of the formula IV (IV)

    6.
    发明专利
    未知

    公开(公告)号:ES2140758T3

    公开(公告)日:2000-03-01

    申请号:ES96109720

    申请日:1996-06-18

    Applicant: BASF AG

    Abstract: Prepn. of 1,2,4-triazolium salts of formula (Ia) and 1,2,4-triazolines of formula (Ib) comprises (a) reacting an amidrazone of formula (R )(NHR )C=N-NHR (II) with a carboxylic acid of formula R COOH (III) or its functional deriv. (IIIa) to give (Ia; A = anion of (III)), opt. followed by exchanging the anion for another A; and opt. (b) reacting (Ia), without isolation, with an alcohol or thiol cpd. of formula X-Y-R (IV) to give (Ib). R -R , R = organic gps., where R , R may be linked to form a 5-8 membered ring; R = H or organic gp.; A = 1 equiv. of an anion; Y = O or S ; X = H, alkali metal or alkaline earth metal.

    10.
    发明专利
    未知

    公开(公告)号:DE59509620D1

    公开(公告)日:2001-10-25

    申请号:DE59509620

    申请日:1995-07-08

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP95/02660 Sec. 371 Date Jan. 21, 1997 Sec. 102(e) Date Jan. 21, 1997 PCT Filed Jul. 8, 1995 PCT Pub. No. WO96/02484 PCT Pub. Date Feb. 1, 1996A process for the preparation of acyloins of the general formula I (I) in which Ra and Rb are the same or different and stand for hydrogen or an optionally substituted C1-C20alkyl, an optionally substituted C6-C10aryl, an optionally substituted C7-C12aralkyl, an optionally substituted heteroaryl, or an optionally substituted heterocycloalkyl group, except for autocondensation products of formaldehyde, wherein an aldehyde of the formula IIRaCHO,(II)is reacted, in the presence of a catalyst, with an aldehyde of the formula IIIRbCHO,(III)in which Ra and Rb have the above meanings and at least one of the radicals Ra and Rb denotes a radical other than hydrogen, which have been produced, with the assistance of an auxiliary base, from a triazolium salt of the formula IV (IV)

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