in over-the-counter consumer antiseptic wash products, due to their toxicity. Withdrawal of TCC has prompted efforts to search for new antimicrobial compounds. In this paper, we present the synthesis and biologicalevaluation, as antibiotic and non-cytotoxic agents, of a series of diarylureas, analogues of TCC. These compounds are characterized by an intriguingly simple chemistry and can be easily synthesized
Hydroamination of carbodiimides, isocyanates, and isothiocyanates by a bis(phosphinoselenoic amide) supported titanium(<scp>iv</scp>) complex
作者:Jayeeta Bhattacharjee、Suman Das、Ravi K. Kottalanka、Tarun K. Panda
DOI:10.1039/c6dt03063g
日期:——
isothiocyanates by a bis(phosphinoselenoic amide) supported titanium(IV) complex as a precatalyst is reported here. The titanium(IV) complex [Ph2P(Se)NCH2CH2NPPh2(Se)}Ti(NMe2)2] (1) was synthesised by the reaction of tetrakis-(dimethylamido)titanium(IV) [Ti(NMe2)4] with [Ph2P(Se)NHCH2CH2NHPPh2(Se)}] in toluene at ambient temperature. Titanium complex 1 proved to be a competent pre-catalyst for the addition of
Hydroamination and Hydrophosphination of Isocyanates/Isothiocyanates under Catalyst‐Free Conditions
作者:Xiancui Zhu、Mengchen Xu、Jinrong Sun、Dianjun Guo、Yiwei Zhang、Shuangliu Zhou、Shaowu Wang
DOI:10.1002/ejoc.202100932
日期:2021.10.7
Various ureas, thioureas, phosphathioureas and their chiral analogues were synthesized in good to excellent yields by the hydroamination and hydrophosphination of isocyanates/isothiocyanates under catalyst-free conditions.
Imidazolin-2-iminato Ligand-Supported Titanium Complexes as Catalysts for the Synthesis of Urea Derivatives
作者:Kishor Naktode、Suman Das、Jayeeta Bhattacharjee、Hari Pada Nayek、Tarun K. Panda
DOI:10.1021/acs.inorgchem.5b02302
日期:2016.2.1
titanium complex 1c was utilized as a precatalyst for the addition of amine N–H bond to phenyl isocyanate. High yields of the corresponding ureaderivatives were achieved under mild conditions. The mechanistic study of the aforementioned catalytic reaction was performed, and the active catalyst complex 7b was isolated using 2 equiv of iminopyrrole [2-(2,6-iPr2C6H3N═CH)C4H3NH] and the complex 4b. The
四(二甲基氨基)钛(IV)[Ti(NMe 2)4 ]与三种不同的咪唑啉-2-亚胺(Im R NH; R =叔丁基(t Bu),1,2,3,5-二甲基)反应6-二异丙基苯基(Dipp))提供了相应的咪唑啉-2-亚氨基钛络合物[(Im R N)Ti(NMe 2)3 ](R = t Bu,1a ; R = Mes,1b ; R = Dipp,1c) 。复杂的治疗1A与两个不同的碳二亚胺[R'N═C═NR'; R'=环己基(Cy)和异丙基(iPr)]形成[(Im R N)Ti(R'NC(NMe 2)NR')(NMe 2)2(R'= i Pr; R = t Bu(2a),R = Dipp(2c); R'= Cy,R = t Bu(3a)],为黄色固体,产率为94%,但是1b和1c与2的反应相似在环境温度苯基异氰酸酯的当量导致对应钛,二的形成(ureate)配合物[(IM [R N)的Ti κ 2 -OC(NME
1,2,3- and 1,2,4-triazolium salts, pyrazoles, and quinoxalines from diarylnitrilimines and isocyanides: A study of the scope
作者:Dietrich Moderhack、Ali Daoud
DOI:10.1002/jhet.5570400411
日期:2003.7
4-triazolium salts 11 are formed. Compounds 11 with tert-butyl group at the ring are unstable too, giving rise to triazoles 13. Pyrazoleformation (analogues of 14) is completely suppressed when both tert-butyl and aryl isocyanides are used, whereas access to this ring system works best with see-alkyl isocyanides (the influence of substituents of 2 being almost negligible in this case). Formation of quinoxalines