Mesoporous molecular sieve MCM-41 catalyzed one-pot synthesis of 3,4-dihydro-2(1H)-pyrimidinones and –thiones under solvent-free conditions

An efficient synthesis of 3,4-dihydro-2(1H)-pyrimidinones and -thiones using MCM-41 as the catalyst from an aldehyde, β-keto ester, and urea or thiourea under solvent-free conditions is described.KEY WORDS: Biginelli reaction, Dihydropyrimidinones, MCM-41, One-pot, Reusable Bull. Chem. Soc. Ethiop. 2011, 25(2), 309-313

EFFICIENT SODIUM SELENATE-CATALYZED SYNTHESIS OF 3,4-DIHYDRO-2(1H)-PYRIMIDINONES AND –THIONES UNDER SOLVENT-FREE CONDITIONS

Sodium selenate efficiently catalyzes the three-component Biginelli reaction of an aldehyde, a,β-keto ester and urea or thiourea under solvent-free conditions to afford the corresponding 3,4-dihydropyrimidin-2(1H)-ones or –thiones in excellent yields. KEY WORDS: Dihydropyrimidinones, Sodium selenate, Biginelli reaction, Three component reaction Bull. Chem. Soc. Ethiop. 2009, 23(1), 141-144

H14[NaP5W30O110] as a Heterogeneous Recyclable Catalyst for the Air Oxidation of Thiols Under Solvent Free Conditions

The catalytic oxidation of thiols to the corresponding disulfides usingPreyssler’s catalyst H14[NaP5W30O110] has been studied. These highly selective oxidationsgave good yields of the target disulfides

Waiting for Godot is an Irish Endgame: A Postcolonial Reading of Samuel Beckett’s Waiting for Godot and Endgame

Irish National Drama is very sensitive when it comes to the issue of English Colonization, colonial forces, independence and the matter of post-colonial. In fact, a kind of Irish consciousness is present in all the dramas of this nation and all playwrights in this trend- even indirectly or by implication- have tried to portray these matters through their works. This study is an attempt to prove the claim that even a playwright like Samuel Beckett, whose works have been written out of the canon of Irish Literature because of living on exile, adopting another language or semi-taboo labels like Absurdism, Universality and Placlessness, can be read in light postcolinalism. To this aim, two of Beckett’s plays Waiting for Godot and End Game are chosen here as the representative and put into explication.

<b>Efficient sodium selenate-catalyzed synthesis of 3,4-dihydro-2(1<i>H</i>)-pyrimidinones and –thiones under solvent-free conditions</b>

Sodium selenate efficiently catalyzes the three-component Biginelli reaction of an aldehyde, a,β-keto ester and urea or thiourea under solvent-free conditions to afford the corresponding 3,4-dihydropyrimidin-2(1<i>H</i>)-ones or –thiones in excellent yields

Bis(trimethylsilyl)chromate Catalyzed Oxidations of Alcohols to Aldehydes and Ketones with Periodic Acid

A facile, selective and high yielding bis(trimethylsilyl) chromate (BTSC) catalyzed selective oxidation of alcohols to aldehydes and ketones with periodic acid is reported