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ChemInform Abstract: Simple Ultrasound-Assisted Synthesis of 3,4-Dihydropyrimidin-2(1H)-one and 3,4-Dihydropyrimidine-2(1H)-thione-Fused Steroidal Derivatives by a Three-Component Reaction.

✍ Scribed by Dutta, Mandakini; Gogoi, Junali; Shekarrao, Kommoori; Goswami, Jonalee; Gogoi, Sanjib; Boruah, Romesh Chandra

Book ID
118755554
Publisher
John Wiley and Sons
Year
2012
Weight
40 KB
Volume
43
Category
Article
ISSN
0931-7597

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## Abstract Fluoroboric acid supported on silica gel (HBF~4~‐SiO~2~) catalyzes efficiently the three component condensation of an aldehyde, a 1,3‐dicarbonyl compound and urea or thiourea to afford the corresponding 3,4‐dihydropyrimidin‐ 2(1__H__)‐ones and thiones in high yields. The ambient conditi