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    Production of Acetals of Methylglyoxal
    14.
    发明专利
    Production of Acetals of Methylglyoxal 未知

    公开(公告)号：GB1167645A

    公开(公告)日：1969-10-15

    申请号：GB697467

    申请日：1967-02-14

    Applicant: BASF AG

    Inventor： MASCHKE ARTHUR ,  PASEDACH HEINRICH

    IPC: C07C45/71

    Abstract: 1,167,645. Acetals of methylglyoxal. BADISCHE ANILIN- & SODA-FABRIK A.G. 14 Feb., 1967 [15 Feb., 1966], No. 6974/67. Heading C2C. Acetals of methylglyoxal are made by reacting a mixture of acetone and a monohydric or dihydric alcohol of 1-20 (preferably 1-6) carbon atoms with a nitrosating agent, such as nitrous acid, nitrogen trioxide or an alkyl nitrite, in the presence of an acid catalyst.

    Production of 2-aminopyrimidine
    15.
    发明专利
    Production of 2-aminopyrimidine 未知

    公开(公告)号：GB935352A

    公开(公告)日：1963-08-28

    申请号：GB150262

    申请日：1962-01-16

    Applicant: BASF AG

    Inventor： PASEDACH HEINRICH

    Abstract: A process for the production of 2-amino-pyrimidine comprises reacting proparglyaldehyde at temperatures of -10 DEG C. to +100 DEG C., preferably 0 DEG C. to 40 DEG C., with concentrated hydrochloric acid, the hydrogen chloride content of which it at least 20% by weight and is equal to at least 1 mole equivalent, preferably 3 to 6 mole equivalent, with reference to the amount of proparglyaldehyde, while agitating vigorously, the reaction mixture being allowed to react with guanidine or a salt of guanidine at temperatures between -10 DEG C. and +100 DEG C. The reaction with guanidine or a salt of guanidine is preferably carried out in the presence of a further condensing agent such as hydrobromic acid, sulphuric acid or additional hydrogen chloride. The proparglyaldehyde and hydrogen chloride initially react to produce an adduct which is not b -chloroacrolein. Examples are given, guanidine hydrochloride being used as the guanidine salt. Specifications 765,506 and 807,247 are referred to.

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