46.
    发明专利
    未知

    公开(公告)号:AT265280B

    公开(公告)日:1968-10-10

    申请号:AT668166

    申请日:1966-07-12

    Applicant: BASF AG

    Abstract: 1,148,102. Hexahydropyrimidine derivatives: BADISCHE ANILIN- & SODA-FABRIK A.G. 21 July, 1966 [22 July, 1965; 25 May, 1966. 27 May, 1966; 15 June, 1966], No. 32819/66 Heading C2C. Novel hexahydropyrimidine derivatives of the formula in which R 1 and R 2 denote hydrogen atoms or C 1-8 alkyl radicals, R 3 and R 4 denote C 1-4 alkyl radicals, R 5 denotes a hydrogen atom or a C 1-2 alkyl radical and X denotes an oxygen or sulphur atom, are prepared by reacting urea derivatives R 1 NH.CX.NHR 2 with aldehydes R 3 R 4 .CH.CHO and R 5 .CHO in about equimolar proportions with the addition of acid and at elevated temperatures, the reaction product being neutralized with a base. The compounds may be converted to the corresponding 4-ureidohexahydropyrimidines, which are useful as slowacting fertilizers, by reaction with urea.

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