Optimized Liebeskind–Srogl coupling reaction between dihydropyrimidines and tributyltin compounds
摘要:
We developed an optimized Liebeskind-Srogl reaction in order to synthesize potentially biologically active 2-aryl-1,4-dihydropyrimidines. The pallado-catalyzed cross-coupling reaction between dihydropyrimidines and tributyltin derivatives appears particularly efficient (67-95% yields) when using CuBr.Me2S as the copper cofactor. (C) 2012 Elsevier Ltd. All rights reserved.
A Simple and Efficient One-Pot Synthesis of Multifunctional 5-Aryl-<i>5H</i>-thiazolo[3,2-a]pyrimidines
作者:Seerat Fatima、Anindra Sharma、Rahul Sharma、Rama P. Tripathi
DOI:10.1002/jhet.831
日期:2012.5
One‐pot economical and efficientsynthesis of multifunctional 5H‐thiazolo[3,2‐a]pyrimidines by the reaction of 4‐aryl dihydrothiopyrimidines with propargyl bromide in the presence of inorganic base has been reported in very short time.
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
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.