Journal ArticleDOI
Tetrabutylammonium tribromide (TBATB)-promoted tetrahydropyranylation/depyranylation of alcohols☆
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In this paper, a catalytic amount of TBATB in dichloromethane at room temperature is used to achieve tetrahydropyranylation to the parent alcohol.About:
This article is published in Tetrahedron Letters.The article was published on 2001-10-22. It has received 89 citations till now. The article focuses on the topics: Tetrabutylammonium tribromide & Solvent.read more
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A New Recyclable Ditribromide Reagent for Efficient Bromination under Solvent Free Condition
TL;DR: 1,2-Dipyridiniumditribromide-ethane (DPTBE) has been synthesized and explored as a new efficient brominating agent that has high active bromine content per molecule and shows a remarkable reactivity compared to other tribromide reagents toward various substrates.
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Synthesis of highly functionalized piperidines by one-pot multicomponent reaction using tetrabutylammonium tribromide (TBATB)
TL;DR: Tetrabutylammonium tribromide (TBATB) has been found to be an efficient catalyst for the one-pot synthesis of highly substituted piperidines through a combination of 1,3-dicarbonyl compounds, aromatic aldehydes, and various amines in ethanol at room temperature as mentioned in this paper.
Journal ArticleDOI
Tetrabutylammonium tribromide (TBATB) as an efficient generator of HBr for an efficient chemoselective reagent for acetalization of carbonyl compounds.
TL;DR: Chemoselective acetalization of an aldehyde in the presence of ketone, unsymmetrical acetal formation, shorter reaction times, mild reaction conditions, the stability of acid-sensitive protecting groups, high efficiencies, facile isolation of the desired products, and the catalytic nature of the reagent make the present methodology a practical alternative.
Journal ArticleDOI
Solid silica-based sulfonic acid as an efficient and recoverable interphase catalyst for selective tetrahydropyranylation of alcohols and phenols
Babak Karimi,Maryam Khalkhali +1 more
TL;DR: In this article, various types of alcohols and phenols are converted to tetrahydropyranyl (THP) ether using a catalytic amount of solid silica-based sulfonic acid.
References
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Protective groups in organic synthesis
TL;DR: In this article, the most useful groups for the hydroxyl, amino, carboxyl, carbonyl, and sulfhydryl groups are discussed and the chemistry of the classes of these groups, as well as that of individual groups within the class using structures, equations and references.
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Regioselective Bromination of Organic Substrates by Tetrabutylammonium Bromide Promoted by V2O5−H2O2: An Environmentally Favorable Synthetic Protocol
Upasana Bora,Gopal Bose,Mihir K. Chaudhuri,Siddhartha Sankar Dhar,Rangam Gopinath,Abu T. Khan,Bhisma K. Patel +6 more
TL;DR: Mild conditions, high selectivity, yield, and reaction rate, and redundancy of bromine and hydrobromic acid are some of the major advantages of the synthetic protocol.
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An environmentally benign synthesis of organic ammonium tribromides (OATB) and bromination of selected organic substrates by tetrabutylammonium tribromide (TBATB)
Mihir K. Chaudhuri,Abu T. Khan,Bhisma K. Patel,Deepa Dey,Wancydora Kharmawophlang,T. R. Lakshmiprabha,Gagan C. Mandal +6 more
TL;DR: In this article, stable crystalline organic ammonium tribromides (OATB) were synthesized from the reaction of the corresponding bromides with V2O5 and aqueous H2O2.
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Bromination of Phenols by Use of Benzyltrimethylammonium Tribromide
TL;DR: In this article, the reaction of phenols with benzyltrimethylammonium tribromide in dichloromethane-methanol for 1 h at room temperature gave polybromophenols in good yields.
Journal ArticleDOI
Tetrabutylammonium tribromide (TBATB)-MeOH: An efficient chemoselective reagent for the cleavage of tert-butyldimethylsilyl (TBDMS) ethers
Rangam Gopinath,Bhisma K. Patel +1 more
TL;DR: TBDMS, THP, and DMT ethers are efficiently deprotected with tetrabutylammonium tribromide in methanol and are most suitable for practical organic synthesis.