76043-20-4Relevant academic research and scientific papers
Novel cyclization of dimeric dianions anils or aldehydes with triphosgene: A safe and efficient synthesis of substituted imidazolidin-2-ones and 4,5-diaryl-1,3-dioxolan-2-ones
Li, Zhifang,Zhang, Yongmin
, p. 46 - 49 (2007/10/03)
Substituted imidazolidin-2-ones and 4,5-diaryl-1,3-dioxolan-2-ones, were synthesized from the reaction of Schiff bases or aldehydes with samarium diiodide in dry THF, followed by addition of triphosgene. The reactions were clean and only imidazolidin-2-ones could be detected by examination of 1H nuclear magnetic resonance spectra of crude products. All reactions were completed within 2-4 h, with moderate to good yields of immidazolidin-2-ones being isolated.
Low-valent titanium induced cyclization of dimeric dianions of anils with triphosgene: A safe and efficient method for the syntheses of substituted imidazolidine 2-ones
Li, Zhifang,Zhang, Yongmin
, p. 2613 - 2618 (2007/10/03)
Induced by low-valent titanium reagent, substituted imidazolidine 2-ones were synthesized from imines and triphosgene in moderate to good yields.
Novel Cyclisation of Dimeric Dianions of Anils with Ethyl Chloroformate: Formation of 1,3,4,5-Tetraarylimidazolidine-2-ones
Prasad, Girija,Singh, Geeta,Mehrotra, K. N.
, p. 653 - 654 (2007/10/02)
The reaction of schiff bases (Ia-f) with sodium in dry ether followed by addition of ethyl chloroformate gives 1,3,4,5-tetraarylimidazolidine-2-ones (II) identified and characterised on the basis of analytical and spectral (IR, UV and PMR) data.The possible mechanistic route for the formation of products has been presented.
