Publisher： Bentham Science Publishers
E-ISSN： 1875-6255|2|4|354-359
ISSN： 1570-1786
Source： Letters in Organic Chemistry, Vol.2, Iss.4, 2005-06, pp. : 354-359
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Abstract
The modification on natural phosphate (NP) with sodium nitrate by calcination catalyzed Michael addition of mercaptans and amines to chalcone derivatives with high yields under mild reaction conditions. By-products of usual undesirable reaction in Michael condensation such as 1,2-addition, bis-addition and polymerization are not observed. The work-up procedure is simplified by simple filtration with the use of Na/NP-2. This catalyst is used for the facile synthesis of &bgr;-amino acid and &bgr;-amino diacid under heterogeneous conditions.
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