726-42-1Relevant articles and documents
Catalytic Imido-Transfer Reactions of Well-Defined Silica-Supported Titanium Imido Complexes Prepared via Surface Organometallic Chemistry
Zhizhko, Pavel A.,Pichugov, Andrey V.,Bushkov, Nikolai S.,Rumyantsev, Andrey V.,Utegenov, Kamil I.,Talanova, Valeria N.,Strelkova, Tatyana V.,Lebedev, Dmitry,Mance, Deni,Zarubin, Dmitry N.
, p. 1014 - 1023 (2020/02/26)
We expand the series of well-defined silica-supported titanium imido complexes of general formula (SiO)Ti(═NtBu)X(py)n prepared via surface organometallic chemistry in order to analyze the effect of the X ligand on their catalytic properties. Two new surface complexes, (SiO)Ti(═NtBu)Cl(py)2 (2s) and (SiO)Ti(═NtBu)Cp(py) (3s), have been prepared and characterized with physicochemical techniques, and their performance in oxo/imido heterometathesis and other catalytic imido-transfer reactions has been studied and compared to that of the previously reported catalyst (SiO)Ti(═NtBu)(Me2Pyr)(py)2 (1s; Me2Pyr = 2,5-dimethylpyrrolyl).
RE[N(SiMe3)2]3-Catalyzed Guanylation/Cyclization of Amino Acid Esters and Carbodiimides
Lu, Chengrong,Gong, Chao,Zhao, Bei,Hu, Lijuan,Yao, Yingming
, p. 1154 - 1159 (2018/02/10)
The example of rare-earth metal-catalyzed guanylation/cyclization of amino acid esters and carbodiimides is well-established, forming 4(3H)-2-alkylaminoquinazolinones in 65-96% yields. The rare-earth metal amides RE[N(TMS)2]3 (RE = Y, Yb, Nd, Sm, La; TMS = SiMe3) showed high activities, and La[N(TMS)2]3 performed best for a wide scope of the substrates.
Ultrasonic-assisted synthesis of carbodiimides from N,N′-disubstituted thioureas and ureas
Duangkamol, Chuthamat,Pattarawarapan, Mookda,Phakhodee, Wong
, p. 1945 - 1949 (2016/10/21)
A facile and efficient sonochemical method for the preparation of carbodiimides from their corresponding thioureas or ureas was described. Using Ph3P–I2 combination in the presence of triethylamine, various diaryl, aryl–alkyl, as well as dialkyl substituted substrates could be converted into carbodiimides in good-to-excellent yields within short reaction times under mild conditions with simple experimental setup. Graphical abstract: [Figure not available: see fulltext.]