Natural Phosphate Modified with Lithium Nitrate: A New Efficient Catalyst for the Construction of Carbon–Carbon, Carbon–Sulfur, and Carbon–Nitrogen Bonds

Autor:	Ahmed Rayadh, Said M. Sebti, Bouchaib Bahlaouan, Mohamed Zahouily, Bahija Mounir, Hind Cherki
Rok vydání:	2007
Předmět:	Lithium nitrate Organic Chemistry Inorganic chemistry chemistry.chemical_element Heterogeneous catalysis Biochemistry Sulfur Catalysis law.invention Inorganic Chemistry chemistry.chemical_compound chemistry Polymerization law Michael reaction Calcination Carbon
Zdroj:	Phosphorus, Sulfur, and Silicon and the Related Elements. 182:1203-1217
ISSN:	1563-5325 1042-6507
Popis:	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 β-amino acids, β-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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::18d332f2dd5baae38007c89c340ad18e https://doi.org/10.1080/10426500601160397 Zobrazit plný text záznamu