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    • 5. 发明授权
    • Process for the preparation of 7-acylamino-3-hydroxy-cephem-4-carboxylic
acids and 7-acylamino-3-hydroxy-1-dethia-1-oxacephem-4-carboxylic acids
    • 制备7-酰基氨基-3-羟基 - 头孢烯-4-羧酸和7-酰基氨基-3-羟基-1-脱硫-1-氧代四氢-4-羧酸的方法
    • US4616084A
    • 1986-10-07
    • US636470
    • 1984-07-31
    • Dieter HabichWolfgang Hartwig
    • Dieter HabichWolfgang Hartwig
    • C07C205/42C07D205/085C07D501/02C07D501/59C07D503/00C07D505/00A61K31/545
    • C07D505/00C07C201/12C07D205/085C07D503/00Y02P20/55
    • A process for the preparation of a 7-acylamino-3-hydroxy-2-cephem-4-carboxylic acid, 7-acylamino-3-hydroxy-1-dethia-1-oxa-3-cephem-4-carboxylic acid or derivative thereof of the general formula ##STR1## in which R.sup.1 is hydrogen or optionally substituted alkyl, alkenyl, alkinyl, aralkyl, aryl, heteroaryl, heteroaralkyl, aryloxyalkyl, heteroaryloxyalkyl, alkoxyalkyl, arylthioalkyl, heteroarylthioalkyl, alkylthioalkyl, alkoxy, aryloxy, alkylthio or arylthio,R.sup.2 is hydrogen, a carboxy-protective group or a pharmaceutically useful ester radical, andX is sulphur or oxygen,which comprises:(a) reacting a compound of the formula ##STR2## with (i) a compound of the formula ##STR3## in which R.sup.2 and X have the abovementioned meaning and Y represents diazo (N.sub.2) or hydrogen (H.sub.2) in an inert solvent in the presence of a Lewis acid or proton acid catalyst, or(ii) a compound of the formulaHX--CH.sub.2 --C.tbd.C--COOR.sup.2 to form an intemediate compound having a triple bond, and hydrating the triple bond, the compounds thus obtained, for Y being hydrogen (H.sub.2)--(in case of Y=diazo (N.sub.2) directly the compounds of general formula (2) are obtained) thereby to produce a compound of the formula ##STR4## (b) reacting such compound with an azide in a solvent in the presence of a base to give a compound of the formula ##STR5## (c) converting said compound to the desired product by (i) irradiation in an inert solvent, or(ii) warming in the presence of a catalyst.The end products are, or can be converted to, known .beta.-lactam antibiotics.
    • 制备7-酰基氨基-3-羟基-2-头孢烯-4-羧酸,7-酰基氨基-3-羟基-1-脱硫-1-氧杂-3-头孢烯-4-羧酸或其衍生物的方法 烯基,炔基,芳烷基,芳基,杂芳基,杂芳烷基,芳氧基烷基,杂芳基氧基烷基,烷氧基烷基,芳硫基烷基,杂芳硫基烷基,烷硫基烷基,烷氧基,芳氧基,烷硫基或芳硫基,其中R 1为氢或任选取代的烷基, R2是氢,羧基保护基或药学上有用的酯基,X是硫或氧,其包括:(a)使式(IMAGE)的化合物与(i)下式化合物 其中R2和X具有上述含义,Y代表重氮(N 2)或氢(H 2)在惰性溶剂中,在路易斯酸或质子酸催化剂存在下,或(ii)式HX-CH2- C 3 C COR CO 2,以形成具有三键的中间体化合物,并且使三键水合,该共聚物 (H)在(Y =重氮(N 2)的情况下直接得到通式(2)的化合物),得到下式的化合物:(b)使此 在碱的存在下在溶剂中与叠氮化合物反应,得到下式的化合物:(c)通过(i)在惰性溶剂中照射将所述化合物转化为所需产物,或(ii)在 存在催化剂。 最终产品是或可以转化为已知的β-内酰胺抗生素。