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Green Protocol for the Biginelli Three-Component Reaction: Ag3PW12O40 as a Novel, Water-Tolerant Heteropolyacid for the Synthesis of 3,4-Dihydropyrimidinones.

✍ Scribed by Jhillu S. Yadav; Basi V. Subba Reddy; Pamu Sridhar; Joolakanti S. S. Reddy; Kommu Nagaiah; Nakka Lingaiah; Potharaja S. Saiprasad

Publisher
John Wiley and Sons
Year
2004
Weight
128 KB
Volume
35
Category
Article
ISSN
0931-7597

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## Abstract Biginelli three‐component condensation of an aldehyde, β‐keto ester, and urea proceeds smoothly on the surface of the silver salt of heteropolyacid (HPA), i.e. Ag~3~PW~12~O~40~, in water to afford the corresponding 3,4‐dihydropyrimidinones in high‐to‐quantitative yields under mild condi

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## Abstract A variety of β‐keto esters (II) and aromatic aldehydes (III) reacts smoothly with urea in the presence of [Al(H~2~O)~6~](BF~4~)~3~.