- Ultrasound-assisted 3-component reaction in acetic acid alone: Catalyst/promoter/ligand free synthesis of bioactive pyrazolo[1,5-a]pyrimidines
-
Background: Acetic acid alone when employed as a solvent under ultrasound irradiation has been found to be effective for the three-component reaction involving ethyl-5- A mino-1H-pyrazole-4-carboxylate, aromatic aldehydes and terminal alkynes in the prese
- Suresha, Namburi,Durgaraoa, Bodapati Veera,Ratnakar,Kolli, Sunder Kumar,Ashfaq, Mohd Ashraf,Rao, Mandava V. Basaveswara,Pal, Manojit
-
p. 1176 - 1183
(2017/11/14)
-
- Construction of a six-membered fused N-heterocyclic ring via a new 3-component reaction: Synthesis of (pyrazolo)pyrimidines/pyridines
-
A conceptually new three-component reaction was developed to construct a six-membered fused N-heterocyclic ring affording (pyrazolo)pyrimidines/pyridines as potential inhibitors of PDE4. The reaction is catalyzed by triflic acid in acetic acid in the pres
- Kumar, P. Mahesh,Kumar, K. Siva,Mohakhud, Pradeep Kumar,Mukkanti,Kapavarapu,Parsa, Kishore V. L.,Pal, Manojit
-
supporting information; experimental part
p. 431 - 433
(2012/01/13)
-
- Synthesis and tautomerism of 5,7-diaryl-3-cyano-and 5,7-diaryl-3- ethoxycarbonyl-4,7(6,7)-dihydropyrazolo[1,5-a]pyrimidines
-
The cyclocondensation of 3-amino-4-cyanopyrazole and 3-amino-4- ethoxycarbonylpyrazole with 1,3-diaryl-2,3-propen-1-ones gives the corresponding 3-substituted 5,7-diaryl-4,7(6,7)-dihydropyrazolo[1,5-a]pyrimidines. Their tautomeric composition in solution has been investigated by 1H NMR.
- Lipson,Desenko,Borodina,Shirobokova
-
p. 1544 - 1550
(2008/09/20)
-