95003-25-1Relevant academic research and scientific papers
Natural phosphate modified with lithium nitrate: A new efficient catalyst for the construction of carbon-carbon, carbon-sulfur, and carbon-nitrogen bonds
Zahouily, Mohamed,Mounir, Bahija,Cherki, Hind,Bahlaouan, Bouchaib,Rayadh, Ahmed,Sebti, Said
, p. 1203 - 1217 (2007)
The addition of small amounts of lithium nitrate to natural phosphate followed by calcination gives a new catalyst Li/NP (weight ratio LiNO3/NP = 1/15). This material showed catalytic activity in the Michael addition of amines, mercaptans, and active methylene compounds to chalcone derivatives with high yields under mild reaction conditions. Li/NP is used as the catalyst for a facile synthesis of -amino acids, -sulfur acids, and 4 H-chromenes under heterogeneous conditions. The usual, undesirable byproducts from the Michael condensation such as 1,2-addition, bis-addition, and polymerization compounds are not observed with this method. The work-up procedure is simplified by simple filtration with the use of Li/NP.
