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    • 71. 发明专利
    • JPS5229316B1
    • 1977-08-01
    • JP6305971
    • 1971-08-20
    • C07B61/00C07C57/58C07C231/00C07C243/32C07C247/12C07C273/18C07C275/50C07C301/00C07D213/80C07D499/00C07D499/12C07D499/68
    • 1,274,088. Acylating agent; preparing penicillins. A. L. P. COLL. 19 Dec., 1969 [21 Dec., 1968; 12 May, 1969; 26 July, 1969], No. 62155/69. Headings C2A and C2C. An acylating agent of the formula where R is a substituted or unsubstituted aliphatic, alicyclic, aromatic, alkylaromatic or heterocyclic group; n is an integer from 0 to 20; Hal is a chlorine, fluorine, or bromine atom and X is an alkoxy, phenoxy, hydroxy, azido, amino, or nitrile group is prepared by reacting an organic carboxylic acid or an inorganic or tertiary amine salt thereof with a dimethyl formiminium halosulphite H, halide of formula where X is chlorine, bromine or fluorine. The product may be used for the preparation of amides, azides or esters of carboxylic acids by reacting it with a compound containing a functional amine, azine or hydroxyl group. The dimethylformiminium halosulphite, N, halide may be prepared by the reaction of a thionyl halide with a stoichiometric amount of dimethylformiminium in the presence of an organic solvent at - to 20‹ C. Penicillins are produced by using an appropriate acid or salt for the reaction with a dimethyl formiminium-halosulphite, N-halide (D.H.H.) in the production of the acylating agent and reacting this with 6-amino-penicillanic acid. Examples give (11) 2,6-dimethoxy phenylpenicillin using 2,6-dimethoxy benzoic acid and D.C.C., (12) alpha-chlorobenzyl penicillin using mandelic acid and D.C.C., (13) alpha-azidobenzylpenicillin (which may be reduced to an alphaamino derivative) using the sodium salt of alpha-azidophenylacetic acid and D.C.C., (15) phenoxymethylpenicillin using sodium phenoxyacetate and D.C.C., (16) D(-) alpha-fluorbenzylpenicillin using L(+) mandelic acid and D.F.F., (17) alpha carboxypenicillin using phenylmalonic acid D.C.C., (18) D(-) alphamethoxy benzylpenicillin using D(-) alphamethoxy phenylacetic acid and D.C.C., (19) D(-) alpha-bromobenzylpenicillin as in (16) using D.B.B., (20) the corresponding benzylpenicillin from (+ )alpha-trifluoromethylphenyl-acetic acid and D.C.C. and (22) benzyl ferric-esters of D (-) -alpha-amino-benzylpenicillin are similarly prepared.