2‐benzylidene‐7‐methyl‐3‐oxo‐5‐phenyl‐2,3‐dihydro‐5H‐thiazolo[3,2‐a]pyrimidine‐6‐carboxylic acid methyl esters were synthesized and characterized by spectral, crystallographic, and elemental analysis. The antiinflammatory activity of the compounds was tested by the carrageenan hind paw edema test. It was found that compound 6a having a 2‐methoxyphenyl group at position 5 and a benzylidene group at position 2 was
Fe3O4 Nanoparticles as an Efficient and Magnetically Recoverable Catalyst for the Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones under Solvent-Free Conditions
The catalytic activity of Fe3O4 nanoparticles (NPs) in a one-pot three component condensation reaction consisting of an aromatic aldehyde, urea or thiourea, and a β-dicarbonyl under solvent-free conditions was investigated. This reaction affords the corresponding dihydropyrimidinones (thiones) in high to excellent yields. Compared with the classical Biginelli reactions this method consistently gives
using HCl as a catalyst according to the Biginelli reaction. The structures of the compounds were confirmed by elemental and spectroscopic analysis. ‐ The compounds were evaluated for their calciumantagonisticactivity on the basis of their potency in inhibiting [3H] PN 200—110 binding on microsomes obtained from rat skeletal muscle.
Synthesis and pharmacological study of new 3,4-dihydro-2H,6H-pyrimido-[2,1-b][1,3]thiazines
作者:D Bózsing、P Sohár、G Gigler、G Kovács
DOI:10.1016/0223-5234(96)85874-0
日期:1996.1
A series of racemic pyrimido-thiazine derivatives was synthesized and many of their in vivo activities found to be comparable to acetylsalicylic acid and aminophenazone in an antiinflammatory model and an antipyretic test. Analogues 7a and 7e are the most potent in rat carrageenin and yeast fever assays. These compounds did not inhibit prostaglandin biosynthesis in vitro.