869790-27-2Relevant academic research and scientific papers
Transition-metal-free intramolecular N-arylations
Thome, Isabelle,Bolm, Carsten
, p. 1892 - 1895 (2012/05/20)
N-Substituted phenoxazines and related aza analogs have been prepared from N-acetylated aryloxy anilides by transition-metal-free, base-catalyzed cyclization reactions. In the presence of a mixture of 10 mol % of N,N′-dimethylethylenediamine (DMEDA) and 2 equiv of K2CO 3 in toluene at 135 °C the products are obtained in high yields.
Intramolecular carbonylation reactions with recyclable palladium-complexed dendrimers on silica: Synthesis of oxygen, nitrogen, or sulfur-containing medium ring fused heterocycles
Lu, Shui-Ming,Alper, Howard
, p. 14776 - 14784 (2007/10/03)
Palladium-complexed dendrimers supported on silica were evaluated as catalysts for intramolecular carbonylation reactions. The results showed that dendritic catalysts display high activity, affording oxygen, nitrogen, or sulfur-containing seven- or eight-membered ring fused heterocycles in excellent yields. Moreover, these catalysts have competitive advantages in that they can be easily recovered by simple filtration in air and reused for up to eight cycles with only a slight loss of activity.
