Formation of DPM ethers using O-diphenylmethyl trichloroacetimidate under thermal conditions
作者:Kyle T. Howard、Brian C. Duffy、Matthew R. Linaburg、John D. Chisholm
DOI:10.1039/c5ob02455b
日期:——
diphenylmethyl (DPM) ethers by reaction with O-diphenylmethyl trichloroacetimidate in refluxing toluene without the requirement of a catalyst or other additives. A number of acid and base sensitive substrates were protected in excellent yield using this new method without disturbing the pre-existing functionality present in these molecules. This reaction is the first example of the formation of an ether from stoichiometric
[EN] ANTHRACYCLINE DISACCHARIDES, PROCESS FOR THEIR PREPARATION, AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM<br/>[FR] DISACCHARIDES D'ANTHRACYCLINE, LEUR PROCEDE DE PREPARATION ET COMPOSITIONS PHARMACEUTIQUES LES CONTENANT
(EN) The present invention is referred to compounds of general formula (I) and (II), respectively their pharmaceutically acceptable salts, the process for their preparation, and the pharmaceutical compositions containing them.(FR) L'invention se rapporte à des composés de formules générales respectives (I) et (II), à leurs sels acceptables sur le plan pharmaceutique, à leurs procédés de préparation ainsi qu'aux compositions les contenant.
Process for preparing 2-chlorosulfinyl-azetidinones
申请人:ELI LILLY AND COMPANY
公开号:EP0011370A1
公开(公告)日:1980-05-28
2-chlorosulfinyl-azetidin-4-ones of the formula
wherein R is the residue of a carboxylic acid and R is a carboxylic acid protecting group, are prepared by reacting a penicillin sulfoxide ester of the formula
wherein R and R1 are as defined above, with an N-chlorohalogenating agent, e.g. N-chlorophthalimide, in ar, inert organic solvent, e.g. toluene, under essentially anhydrous conditions in the presence of a cross-linked polyvinylpyridine polymer, e.g. poly-(4-vinylpyridine), said polymer containing between about 1 percent and about 10 percent cross-linking with e.g. divinylbenzene.
The 2-chlorosulfinylazetidin-4-ones are used as intermediates for the preparation of 3-exomethylenecepham-4-carboxylic acid ester sulfoxides.
式中的 2-氯亚磺酰基氮杂环丁烷-4-酮,其中 R 是羧酸残基,R 是羧酸保护基团。
式中 R 为羧酸残基、R 为羧酸保护基团的 2-氯亚磺酰基-氮杂环丁烷-4-酮,是由式中的青霉素亚砜酯与 N-氯卤化剂(如 N-氯酞酰亚胺)反应制备的。
其中 R 和 R1 如上定义,在 ar 惰性有机溶剂(如甲苯)中,在基本无水条件下,在交联聚乙烯吡啶聚合物(如聚-(4-乙烯基吡啶))存在下,与 N-氯卤化剂(如 N-氯邻苯二甲酰亚胺)反应,所述聚合物含有约 1%至约 10%的交联剂(如二乙烯基苯)。
2-chlorosulfinylazetidin-4-ones 可用作制备 3-exomethylenecepham-4-carboxylic acid ester sulfoxides 的中间体。
Halogen-substituierte Verbindungen als Pestizide
申请人:Bayer CropScience AG
公开号:EP2184273A1
公开(公告)日:2010-05-12
Die Erfindung betrifft Verbindungen der allgemeinen Formel (I),
in welcher die Reste A1, A2, A3, A4, Lm, Q, R1, T und T die in der Beschreibung angegebene Bedeutung besitzen sowie die Verwendung der Verbindungen zur Bekämpfung von tierischen Schädlingen. Ferner betrifft die Erfindung Verfahren und Intermediate zur Herstellung der Verbindungen gemäß Formel (I).
本发明涉及通式 (I) 的化合物、
其中自由基 A1、A2、A3、A4、Lm、Q、R1、T 和 T 的含义,以及该化合物在防治动物害虫方面的用途。本发明还涉及根据式(I)制备化合物的工艺和中间体。