1,3- and 1,1-Disubstituted thioureas reacted with diethoxy disulfide to give carbodiimides and 1,2,4-thiadiazoles respectively. 1,1,3-Trisubstituted thioureas and diethoxy disulfide afforded trialkyl(trialkylamidino)thioureas.
The present invention relates to a dental composition comprising a specific polymerizable compound and a polymerization initiator system. Furthermore, the present invention relates to the specific polymerizable compound as such and its use in a dental composition. The specific polymerizable compound of the present invention has an N-allyl (meth)acrylamide group, which nitrogen atom is substituted with an alkyl or alkenyl group optionally substituted by a group selected from a hydroxyl group, a C1-4 alkoxy group, a tertiary amino group and a carboxyl group, wherein 1 to 8 carbon atoms in the main chain of the alkyl or alkenyl group may independently from each other be replaced by a heteroatom selected from an oxygen atom and a sulfur atom.
A series of derivatives of rifamycin P, an antibiotic produced by fermentation of a mutant strain of Nocardia mediterranea or by chemical modification of rifamycin S, have been prepared. The structures of these compounds were determined by 1H NMR, IR, UV, and LC/MS. Their in vitro and in vivo antibacterial activities in comparison with rifampicin and two other rifamycins under investigation were evaluated
已经制备了利福霉素P的一系列衍生物,利福霉素P是通过发酵诺卡氏菌突变菌株或通过利福霉素S的化学修饰而产生的抗生素。这些化合物的结构通过1 H NMR,IR,UV和LC / MS确定。与正在研究的利福平和其他两种利福霉素相比,评估了它们的体外和体内抗菌活性。该衍生物比利福霉素P对鸟分枝杆菌复合物和其他缓慢且快速生长的非结核分枝杆菌的活性更高,后者经常导致艾滋病患者的全身感染。2'-(Diethylamino)rifamycin P(P / DEA)似乎适合进一步研究。