13275-10-0Relevant articles and documents
The performance of phthalimide-N-oxyl anion
Dekamin, Mohammad G.,Moghaddam, Firouz M.,Saeidian, Hamdollah,Mallakpour, Shadpour
, p. 1591 - 1595 (2006)
Alkali metal salts of phthalimide-N-oxyl, including Li, Na, and K were prepared and applied as novel selective catalysts to promote the cyclotrimerization of aryl and alkyl isocyanates. This paper is addressing these salts as a new class of organic nucleo
Lithium dibenzylamide, a simple, selective and highly efficient catalyst for isocyanate cyclotrimerization to isocyanurate
Shi, Jingchao,Guo, Zhiqiang,Wei, Xuehong,Liu, Diansheng,Lappert, Michael F.
, p. 1937 - 1939 (2011)
Lithium dibenzylamide catalyzed the rapid and essentially quantitative cyclotrimerization of a variety of isocyanates under mild conditions and could be recycled for six times in high yield. Georg Thieme Verlag Stuttgart New York.
Bidentate pyrrolyl lithium complexes: Synthesis, crystal structure and catalytic activity for the cyclotrimerization of isocyanates
Guo, Zhiqiang,Wang, Song,Tong, Hongbo,Chao, Jianbin,Wei, Xuehong
, p. 68 - 72 (2013)
Three bidentate pyrrolyl lithium complexes were synthesized and their application for the cyclotrimerization of isocyanate to corresponding isocyanurate has been investigated and show high catalytic activities. All lithium complexes were characterized by
Cyclo-oligomerization of isocyanates with Na(PH2) or Na(OCP) as "p-" anion sources
Heift, Dominikus,Benko, Zoltán,Grützmacher, Hansj?rg,Jupp, Andrew R.,Goicoechea, Jose M.
, p. 4017 - 4024 (2015/06/25)
We show that the 2-phosphaethynolate anion, OCP-, is a simple and efficient catalyst for the cyclotrimerization of isocyanates. This process proceeds step-wise and involves five-membered heterocycles, namely 1,4,2-diazaphospholidine-3,5-dionide anions and spiro-phosphoranides as detectable intermediates, both of which were also found to be involved in the catalytic conversion. These species can be considered as adducts of a phosphide anion with two and four isocyanate molecules, respectively, demonstrating that the OCP- anion acts as a formal "P-" source. The interconversion between these anionic species was found to be reversible, allowing them to serve as reservoirs for unique phosphorus-based living-catalysts for isocyanate trimerization.