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SiO2 Catalysed expedient synthesis of [E]-3-alkenoic acids in dry media

✍ Scribed by H.M.Sampath Kumar; B.V.Subba Reddy; E.Jagan Reddy; J.S. Yadav


Publisher
Elsevier Science
Year
1999
Tongue
French
Weight
189 KB
Volume
40
Category
Article
ISSN
0040-4039

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✦ Synopsis


Aliphatic aldehydes with ct-hydrogens and malonic acid undergo decarboxylative condensation on the surface of SiO 2 when subjected to microwave irradiation generating 13"/-unsaturated acids in high yields.


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## Abstract magnified image A series of new hexahydropyrido[2,3‐__d__]pyrimidine derivatives 3 were synthesized by the cyclocondensation reaction of (arylmethylidene)pyruvic acids (=(3__E__)‐4‐aryl‐2‐oxobut‐3‐enoic acids) 1 and 6‐aminouracils (=6‐aminopyrimidine‐2,4(1__H__,3__H__)‐diones) 2 in H~2