中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

55 records (took 0.023 seconds)

    Compounds of the 1,4-divinylbenzene series and their production
    12.
    发明专利
    Compounds of the 1,4-divinylbenzene series and their production 未知

    公开(公告)号：GB906523A

    公开(公告)日：1962-09-26

    申请号：GB1691660

    申请日：1960-05-13

    Applicant: BASF AG

    Inventor： STILZ WALTER ,  POMMER HORST

    IPC: C07B37/00 ,  C07C1/32 ,  C07C17/26 ,  C07D209/86 ,  C07D295/192 ,  C07D307/20 ,  C07D317/54 ,  C07F9/40

    Abstract: Compounds of the 1,4-divinylbenzene series such as 1,4-distyrylbenzene, 1,4-bis-(cyanostyryl)-benzenes, 1,4-bis-(dialkoxystyryl)-benzenes, 1,4-bis-styryl-2,5-dialkoxybenzenes, and 1,4-bis-styryl-2,5-dichlorobenzene, are made by reacting a mono- or di-aldehyde, which may have cyano, alkoxy, nitro, dialkylamino, chloro, or alkoxycarbonyl substituents, with a xylylene, diphosphonate or diphosphinate of the formula wherein R1 is a hydrocarbon, alkoxy, or aryloxy group, and R2 is hydrocarbon group, R3, R4, R5 and R6 are hydrogen or halogen atoms or alkyl, alkoxy, sulphonic acid nitro, or mercapto groups, or taken in pairs they may represent a carbocyclic ring or a dioxymethylene chain, and R7 and R8 are hydrogen atoms or cyano or carboalkoxy groups in the presence of a proton acceptor such as a hydroxide, alcoholate or amide or an alkali or alkaline-earth metal. In Example 1, benzaldehyde is mixed with a solution of p-xylylene-tetraethyl phosphonate in dimethylformamide; and then, while stirring vigorously, a methanolic solution of sodium methylate is added. 1,4-Distyrylbenzene is precipitated as yellowish fluorescent leaflets. Example 20 relates to the preparation of distyrylbenzene by reacting benzaldehyde with the ethyl ester of p - xylylene - bis - phenylphosphinic acid. Examples 5, 15, 22 and 28 relate to the preparation of the following hydrocarbons:-1,4 - dinaphthostyryl-benzene, 1,4-bis-(omega-phenyl-butadienyl)-benzene and 1,4-bis-(p-phenyl-styryl)-benzene. Example 7 describes the preparation of 1,4-bis-(m-cyanostyryl)-benzene by reacting m-cyanobenzaldehyde with p - xylylene - tetraethyl diphosphonate. Examples 16 and 24 relate to the preparation of the corresponding para- and ortho-cyano compounds. Example 8 describes the preparation of 1,4-distyryl-2,5-dimethoxybenzene by reacting benzaldehyde with 2,5-dimethoxy-1,4-xylylene-tetraethyl diphosphonate. Example 12 describes the preparation of 1,4-bis-(21,41-dimethoxystyryl)-benzene. In Example 11, vanillin-tetrahydrofuranyl ether is reacted with p-xylylene-tetraethyl diphosphonate to give 1,4 - bis - (41 - alpha - tetrahydrofuranyloxy - 31 - methoxy-styryl)-benzene, and the latter is then treated with boiling glacial acetic acid whereby 1,4 - bis - (31 - methoxy - 41 - hydroxystyryl)-benzene is obtained. Examples 6 and 19 relate to the preparation of 1,4-bis-(31,41-dioxymethylene-styryl)-benzene. Examples 2, 3, 4, 10, and 17 relate to the preparation of 1,4-bis-(beta-anthraquinonyl-styryl) - benzene, 1,4 - bis - (p-nitrostyryl)-benzene, 1,4-bis-(p-dimethylaminostyryl)-benzene, 1,4-distyryl-2,5-dichlorobenzene and 1,4 - bis - (p-carbmethoxy-styryl)-benzene. Example 26 describes the reaction of p-xylylene-tetraethyl diphosphonate with 4-formyl-benzoic acid morpholide to yield 1,4-bis-(p-carbmorpholido-styryl)-benzene. The required xylylene diphosphonates or diphosphinates are made by reacting p-xylylene dichloride, or a nuclear substituted derivative thereof, with a trialkyl phosphite (see Examples 1, 8, 10, 21 and 23) or with phenyl diethoxy phosphine (Example 19). The 1,4-divinylbenzene compounds have use as optical brighteners.

    Improvements in the production of alpha, beta-unsaturated nitriles
    14.
    发明专利
    Improvements in the production of alpha, beta-unsaturated nitriles 未知

    公开(公告)号：GB884548A

    公开(公告)日：1961-12-13

    申请号：GB751260

    申请日：1960-03-03

    Applicant: BASF AG

    Inventor： STILZ WALTER ,  POMMER HORST

    IPC: C07C255/34

    Abstract: The invention comprises (1) the compounds alpha - cyclohexylidenyl - cyclohexylidene aceto - nitrile, 1,1-dimethoxy-2-methyl-3-cyano-propene(2), p gamma-tetrahydrofuramyloxy-beta-methylcrotonitrile and 1,4-bis-(21cyano-propen-(11)-yl-(11))-benzene; and (2) the preparation of these and other alpha, beta-unsaturated nitriles containing optional halogen, alkoxy, hydroxyl, nitro, amino, carboxyl, carboxylic ester and acyloxy substituents by reacting a phosphonate or phosphinate of the formula in which R1 is an aliphatic, cycloaliphatic or araliphatic radical attached to the phosphorus atom by way of an oxygen atom, R2 has the same meaning as R1 and may also be an aliphatic, cycloaliphatic, araliphatic or aromatic radical attached to the phosphorus atom by means of carbon atom, or in which R1 and R2 may also be common members of a heterocyclic ring carrying optional substituents and containing the phosphorus atom and two oxygen atoms directly attached thereto, R3, R4 and R5 are hydrogen or C1-4 alkyl radicals and n is 0, 1, 2, 3 or 4, with a carbonyl compound in the presence of a proton acceptor. The carbonyl compound may be an aliphatic, aromatic or heterocyclic aldehyde or ketone. Suitable proton acceptors are alkali or alkaline earth metal hydroxides, alcoholates or amides, strongly basic amines or basic ion exchange resins. The reaction may be conducted in water or an inert organic solvent. Phosphinates and phosphonates of the above general formula may be prepared by reacting halonitriles with a phosphinate or phosphorous acid ester, respectively.

Patent Agency Ranking