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

…, H Cherki, B Bahlaouan, A Rayadh…

Index: Zahouily, Mohamed; Mounir, Bahija; Cherki, Hind; Bahlaouan, Bouchaib; Rayadh, Ahmed; Sebti, Said Phosphorus, Sulfur and Silicon and the Related Elements, 2007 , vol. 182, # 6 p. 1203 - 1217

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Citation Number: 3

Abstract

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 ...