110448-29-8Relevant articles and documents
An appropriate one-pot synthesis of dihydropyrimidinones catalyzed by heteropoly acid supported on zeolite: An efficient and reusable catalyst for the Biginelli reaction
Moosavifar, Maryam
, p. 444 - 447 (2012)
A mild and efficient catalytic method has been developed for the synthesis of 3,4-dihydropyrimidin-2 (1H)-ones (DHPM) by a one-pot three-component cyclocondensation reaction using molybdophosphoric acid (MPA) supported on Y zeolite in high to excellent yi
One-pot synthesis of 3,4-dihydro-2(H)-pyrimidinones catalyzed by reusable acidic choline-based ionic liquids
Zhu, Anlian,Li, Qianqian,Li, Lingjun,Wang, Jianji
, p. 463 - 468 (2013)
A series of choline-based ionic liquids (CIL) have been synthesized in this work. The results suggested that both the cations and the anions have significant influences on their properties such as thermostabilities, acidities and their performances for the synthesis of 3,4-dihydro-2(H)-pyrimidinones. The optimized catalytic system based on the CIL [DMEA][HSO4] for the Biginelli reactions benefits from the wide substrates tolerance, benign reaction conditions, easy work-up procedures, and the feasible reusability of the ionic liquid. Graphical Abstract: The thermostabilities, acidities, and the catalytic activities for the Biginelli reactions are all follows the sequence of [DMEA][HSO4] > [Choline] [HSO4] > [DMEA][H 2PO4] > [Choline] [H2PO4][Figure not available: see fulltext.].
Selectfluor catalyzed one pot synthesis of dihydropyrimidinones: An improved protocol for the Biginelli reaction
Kumar, V. Naveen,Kumar, B. Sunil,Reddy, P. Narsimha,Reddy, Y. Thirupathi,Rajitha
, p. 29 - 32 (2007)
A novel one pot condensation of an aldehyde, β-ketoesters and urea / thiourea in acetonitrile has been performed using selectfluor in both conventional and microwave irradiation method affording dihydropyrimidinones in excellent yields (80-95%) and short
Ultrasound aided solvent-free synergy: an improved synthetic approach to access 3,4-dihydropyrimidin-2(1H)-ones
Ramesh, Rathinam,Ramesh, Samikannu,Malecki, Jan Grzegorz,Lalitha, Appaswami
, p. 1197 - 1205 (2019)
Abstract: A remarkably simple synthetic method has been described for the access of structurally diverse 3,4-dihydropyrimidin-2(1H)-ones in excellent yields in the presence of 2,4,6-trichloro-1,3,5-triazine (TCT) as an efficient source of hydrochloric aci
Cobalt manganese oxide nano catalysts as a recyclable catalyst for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones-thiones
Karami, Changiz,Mohammadi, Hadi,Ghodrati, Keivan,Ahmadian, Hossein,Jamshidi, Fariba,Nouri, Maryam,Haghnazarie, Nahid
, p. 271 - 276 (2015)
A simple and effective synthesis of 3,4-dihydropyrimidin-2(1H)-one and thione derivatives has been developed in the presence of nano cobalt manganese oxide as catalyst under thermal solvent-free conditions. The proposed procedure ensures easy to handle, r
Biginelli reaction on Fe3O4-MWCNT nanocomposite: Excellent reactivity and facile recyclability of the catalyst combined with ultrasound irradiation
Safari, Javad,Zarnegar, Zohre
, p. 17962 - 17967 (2013)
A highly efficient and improved synthetic methodology for the preparation of dihydropyrimidinone derivatives using β-dicarbonyl compounds, urea/thiourea and aromatic aldehydes using Fe3O4-MWCNT as a nanocatalyst under ultrasound irra
An efficient one-pot synthesis of 3,4-dihydropyrimidin-2-ones catalyzed by methanesulfonic acid
Jin, Tong-Shou,Wang, Huan-Xin,Xing, Chun-Yong,Li, Xiao-Liu,Li, Tong-Shuang
, p. 3009 - 3016 (2004)
An efficient synthesis of 3,4-dihydropyrimidin-2-ones (DHPMs) from the aldehydes, β-ketoesters, and urea in ethanol using methanesulfonic acid (CH3SO3H) as the catalyst is described. Compared with the classical Biginelli reaction con
Pyridinium-based bronsted acidic ionic liquid as a highly efficient catalyst for one-pot synthesis of dihydropyrimidinones
Hajipour, Abdol R.,Seddighi, Mohadeseh
, p. 227 - 235 (2012)
In this work, the synthesis and characterization of 3-carboxypyridinium hydrogensulfate ([Hcpy]HSO4) as a new Brnsted acidic ionic liquid are reported. This reusable, inexpensive, and green catalyst was employed for one-pot condensation of 1,3-
Graphite catalyzed solvent free synthesis of dihydropyrimidin-2(1H)-ones/ thiones and their antidiabetic activity
Dhumaskar, Kashinath L.,Meena, Surya Nandan,Ghadi, Sanjeev C.,Tilve, Santosh G.
, p. 2897 - 2899 (2014)
A solvent free three component condensation reaction between an aldehyde, ethyl acetoacetate and urea catalyzed by graphite, a green catalyst is described for the synthesis of dihydropyrimidin-2(1H)-ones. This protocol is scalable and the catalyst is reus
One-pot, green and efficient synthesis of 3,4-dihydropyrimidin-2(1H)-ones or thiones catalyzed by citric acid
Ghorbani-Choghamarani, Arash,Taghipour, Tahereh,Azadi, Gouhar
, p. 1202 - 1206 (2013)
One-pot three-component condensation of ethyl acetoacetate, aldehyde and urea or thiourea in refluxing ethanol in the presence of catalytic amounts of citric acid afforded the corresponding 3,4-dihydropyrimidin- 2(1H)-ones/thiones in high yields. The cata