76043-17-9Relevant 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 (2003)
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.
