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    6.
    发明专利
    未知

    公开(公告)号：DE1164418B

    公开(公告)日：1964-03-05

    申请号：DEB0060244

    申请日：1960-11-26

    Applicant: BASF AG

    Inventor： WEIDINGER DR HANS ,  WELLENREUTHER DR GERHARD

    IPC: C07D241/44

    Abstract: Diazines and triazines containing one or two chlorine atoms in position vicinal to ring nitrogen are prepared by reacting the corresponding hydroxy compounds with phosgene at elevated temperature in the presence of a solvent or diluent and in the presence of a compound R1CONR2R3, where R1 p is hydrogen or C1-5 alkyl, R2 is C1-4 alkyl, and R3 is C1-4 alkyl or C6-9 aryl, or R2 and R3 together represent an alkylene group of 2-8 methylene groups, one of which may be replaced by O, or R1 and R3 together represent an alkylene group of 3-7 carbon atoms. Specified R1CONR2R3 compounds are dimethylformamide, diethylformamide, N-methyl-N-butylformamide, N-formyl-pyrrolidine, -piperidine, and -morpholine, N-methylformanilide, N,N- dimethylacetamide, N,N- dimethylbutyramide, N- methylpyrrolidone, N-methylcaprolactam, and N-butylpyrrolidone. Many hydroxy-substituted pyridazines, pyrimidines, quinazolines, pyrazines, quinoxalines, 1,2,4-triazines, and 1,3,5-triazines are listed as suitable reactants; these may contain other substituents, such as halogen atoms, alkyl radicals, and aryl radicals and fused benzene rings which contain further substituents, such as halogen, C1-4 alkoxy, nitro, -COCl, -SO2Cl, N,N-di(C1-3) alkyl sulphonamide, -COOH or -SO3H (these last being converted to -COCl and -SO2Cl during the reaction). Many worked examples are given. Starting materials. 2-Aminobenzamide is reacted with 3- and 4-nitrobenzoyl chloride to produce 2-(m- and p-nitrobenzoylamino)-benzamide, each of which is cyclised using NaOH solution to produce 2-(31- and 41-nitrophenyl)-4-hydroxyquinazoline. 2-Phenyl-4-hydroxy-6-nitroquinazoline is prepared by cyclisation of 2-benzoylamino-5-nitrobenzamide, itself obtained from 2-amino-5-nitrobenzamide and benzoyl chloride. 2-(m-Chlorosulphonylphenyl)- 4,6-dihydroxy-1,3,5-triazine is made by reacting chlorosulphonic acid with 2-phenyl-4,6-dihydroxy-1,3,5-triazine; by reaction with dimethylamine, 2-(m-dimethylaminosulphonylphenyl)- 4,6- dihydroxy-1,3,5-triazine is obtained.

    8.
    发明专利
    未知

    公开(公告)号：DE1196862B

    公开(公告)日：1965-07-15

    申请号：DEB0074558

    申请日：1963-12-06

    Applicant: BASF AG

    Inventor： KUNDE DR JOACHIM ,  GEHM DR ROBERT ,  WEISSAUER DR HERMANN ,  WELLENREUTHER DR GERHARD

    IPC: C08G18/10

    Abstract: Highly elastic polyurethane articles are made by reacting, in an inert polar solvent, substantially linear isocyanate modified polyhydroxy compounds of M.W. from about 750 to 6000 and having terminal -NCO groups with dihydrazino compounds of cyclic diazines containing at least two reactive hydrogen atoms and moulding or applying to a substrate while removing the solvent. Hydrazino compounds specified are:-2,4-dihydrazino-6-methyl-m-diazine; 2, 4 - dihydrazino - 5, 6 - tetramethylene-m-diazine; 2,4 - dihydrazino - 6 - benzyl - m-diazine; 2, 4 - dihydrazino - 5 - methyl - 6-phenyl - m - diazine; 2, 4 - dihydrazinoquinazoline; 2, 3 - dihydrazinoquinoxaline and 1, 4-dihydrazinophthalazine. The polar solvent may be dimethyl formamide, dimethyl acetamide, tetramethylenesulphone or tetramethyl urea.

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