An “off–on” sensor for fluoride using luminescent CdSe/ZnS quantum dots
作者:Ray C. Mulrooney、Narinder Singh、Navneet Kaur、John F. Callan
DOI:10.1039/b817569a
日期:——
The fluorescence emission of CdSe/ZnS QDs was switched âoffâ when the native trioctylphosphine oxide ligands were exchanged for 1-(bis(η5-cyclopentadienyl)iron)-methyl-3-(5,7-dimercapto-heptyl)-urea (4); importantly, the emission of the resulting conjugate 5 was switched âonâ upon addition of fluoride ions.
5-Fluorouracil derivatives, and their pharmaceutical compositions
申请人:Fujisawa Pharmaceutical Company, Ltd.
公开号:US04349552A1
公开(公告)日:1982-09-14
A compound of the formula: ##STR1## wherein R is a bridged alicyclic group selected from the group consisting of norbornyl, norbornenyl, bicyclo[2,2,2]-heptyl and adamantyl optionally substituted by at least one substituent selected from the group consisting of lower alkyl, carboxy, lower alkoxycarbonyl, alkylidenedioxy, N,N-di(lower)alkylcarbamoyl, amino, loweralkoxycarbonylamino and halogen. The present compound is useful in the therapeutic treatment of cancer in human beings and animals.
DMAP Catalyzed One-Pot Curtius Rearrangement Using 1,1-Dimethyl-2,2,2-trichloroethoxycarbonyl Azide
作者:Ken Lin、Hongjian Lu
DOI:10.1021/acs.orglett.3c01580
日期:2023.6.23
of a controllable, base-free, one-pot Curtius rearrangement using 1,1-dimethyl-2,2,2-trichloroethoxycarbonyl azide (DMTN3) with 4-(dimethylamino)pyridine (DMAP) as a catalyst. The scope of this catalytic process covers a range of primary, secondary, and tertiary alkyl and aryl carboxylic acids that allow the efficient stereospecific construction of alkyl or aryl isocyanates. Examples are reported of
5-Fluorouracil derivatives, preparation thereof and their pharmaceutical compositions
申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0010941A1
公开(公告)日:1980-05-14
The present invention provides compounds of the general formula:-
wherein R is an optionally substituted bridged alicyclic radical or a substituted lower alkyl radical, the substituent being an optionally substituted bridged alicyclic group, an amino, protected amino, lower alkoxy, acyl, lower alkylthio, cyano(lower)alkylthio, arylthio or optionally substituted heterocyclic radical or a carboxy and esterified carboxy group, with the proviso, that when the substituent is a carboxy or esterified carboxy group then the lower alkyl radical contains 3 to 6 carbon atoms; or an unsubstituted or substituted lower alkenyl radical, the substituent being an optionally substituted bridged alicyclic group, an optionally substituted aryl radical or an optionally substituted heterocyclic radical; or a halophenyl radical; or an optionally substituted heterocyclic radical.
'The present invention also provides processes for the preparation of these compounds and pharmaceutical composition containing them. Furthermore, the present invention is concerned with a method of treating cancer which comprises administering these compounds to mammals suffering from cancer.
本发明提供通式为:- 的化合物。
其中 R 是任选取代的桥式脂环基或取代的低级烷基,取代基是任选取代的桥式脂环基、氨基、保护氨基、低级烷氧基、酰基、低级烷硫基、氰基(低级)烷硫基、芳硫基或任选取代的杂环基或羧基和酯化羧基,但条件是当取代基是羧基或酯化羧基时,低级烷基含有 3 至 6 个碳原子;或未取代或取代的低级烯基,取代基为任选取代的桥式脂环基、任选取代的芳基或任选取代的杂环基;或卤代苯基;或任选取代的杂环基。
'本发明还提供了制备这些化合物和含有这些化合物的药物组合物的工艺。此外,本发明还涉及一种治疗癌症的方法,该方法包括对患有癌症的哺乳动物施用这些化合物。