An efficient synthesis of imidodicarbonic diamides from 1,3-thiazetidin-2-ones with NH2OH·HCl via ring-opening reaction
作者:Wen-Yuan Tang、Jing-Jing Guo、Xing-Xing Gui、De-Man Han、Jian-Jun Li
DOI:10.1016/j.cclet.2014.10.015
日期:2015.1
Abstract A ring-opening process of 4-imino-1,3-thiazetidin-2-ones with NH2OH·HCl was described for the first time. Two different scaffolds of imidodicarbonic diamide were obtained selectively in good yields in the presence of organic base. The obtained imidodicarbonic diamides were demonstrated by X-ray diffraction analysis.
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
2-Picolylamino(diphenylphosphinoselenoic)amide supported zinc complexes: Efficient catalyst for insertion of N–H bond into carbodiimides, isocyanates, and isothiocyanate
作者:Adimulam Harinath、Kulsum Bano、Shakil Ahmed、Tarun K. Panda
DOI:10.1080/10426507.2017.1370590
日期:2018.1.2
and isothiocyanates by zinc complexes supported by the ligand 2-picolylamino-(diphenylphosphinoselenoic)amide [(Ph2P-(˭Se)}2NCH2(C5H4N)] (1). A series of zinc complexes [κ2-(Ph2P-(˭Se)}2NCH2(C5H4N)ZnX2] [(X˭Cl (2), Br (3a), I (4)] were prepared from ligand 1 and the corresponding zinc dihalide in a 1:1 molar ratio at 60°C in a chloroform solvent. The reaction of ligand 1 and ZnBr2 in methanol yielded
Well-Defined Polyamide Synthesis from Diisocyanates and Diacids Involving Hindered Carbodiimide Intermediates
作者:An-Liu Chen、Kuan-Liang Wei、Ru-Jong Jeng、Jiang-Jen Lin、Shenghong A. Dai
DOI:10.1021/ma1022378
日期:2011.1.11
We have uncovered a novel polycondensationstrategy for the synthesis of well-defined polyamides of narrow molecular weight distributions based on modifications of our sequential self-repetitive reaction (“SSRR”) previously developed for diisocyanate−dicarboxylic acid polymerization. In our newly discovered SSRR polyamide formation mechanism, a small amount of hindered carbodiimide, N,N′-bis(2,6-d