Journal ArticleDOI
Thermal behaviour of aryl γ-haloprcpargyl ethers
TLDR
In this article, a systematic study of the behavior of aryl γ-halopropargyl ethers under thermal condition was undertaken, and the results showed that the transformation of these compounds yielded a mixture of products including 4-bromochromenes and chroman-4-ones.About:
This article is published in Tetrahedron.The article was published on 1989-01-01. It has received 18 citations till now. The article focuses on the topics: Ether & Aryl.read more
Citations
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Journal ArticleDOI
An alternative method for the regio- and stereoselective bromination of alkenes, alkynes, toluene derivatives and ketones using a bromide/bromate couple
Subbarayappa Adimurthy,Sudip Ghosh,Paresh U. Patoliya,Gadde Ramachandraiah,Manoj K. Agrawal,Mahesh Ramniklal Gandhi,Sumesh Chandra Upadhyay,Pushpito Kumar Ghosh,Brindaban C. Ranu +8 more
TL;DR: In this article, a mixture of NaBr and NaBrO3 in two different ratios have been used for highly stereoselective bromination of alkenes and alkynes, and regioselectively bromine substitution at the α-carbon of ketones and at the benzylic position of toluene derivatives.
Journal ArticleDOI
Ruthenium-catalyzed [2 + 2] cycloadditions between bicyclic alkenes and alkynyl halides.
TL;DR: Ru-catalyzed [2 + 2] cycloadditions between norbornadiene and alkynyl halides were found to occur in moderate to good yields and can be transformed into a variety of products that are difficult or impossible to obtain via directcycloaddition.
Journal ArticleDOI
Rhodium-catalyzed intramolecular [4 + 2] cycloadditions of alkynyl halides.
TL;DR: Cationic rhodium(I)-catalyzed intramolecular [4 + 2] cycloadditions of diene-tethered alkynyl halides were found to occur in good yields and could be transformed into a variety of products that are difficult or impossible to obtain via directcycloaddition.
Journal ArticleDOI
Alkynyl Halides in Ruthenium(II)-Catalyzed [2+2] Cycloadditions of Bicyclic Alkenes
Anna Allen,Anna Allen,Karine Villeneuve,Karine Villeneuve,Neil Cockburn,Elisabeth M. Fatila,Nicole Riddell,Nicole Riddell,William Tam +8 more
TL;DR: Ru-catalyzed cycloadditions between bicyclic alkenes and alkynyl halides were found to occur in moderate to good yields as mentioned in this paper, where the presence of the halide moiety greatly enhances the reactivity of the alkyne component in the cycloadding.
References
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Journal ArticleDOI
A novel silver ion assisted cleavage of a trichlorocyclopropane.
Philip E. Brown,Qamrul Islam +1 more
TL;DR: In this article, assisted solvolysis of trichlorocyclopropane (2) gives (3) and assisted cleavage of the initially formed cyclopropachroman-4-ol with subsequent oxidation is suggested as a possible mechanism.
Journal ArticleDOI
On the claisen rearrangement of 1,4-diaryloxy-2-butynes
TL;DR: A proton nmr follow-up provided conclusive evidence for the involvement of two sequential Claisen rearrangements in the thermal rearrangement of 1,4-diaryloxy-2-butnes 1 to 11a-methylpterocarpans 3 as discussed by the authors.
Journal ArticleDOI
Unexpected formation of chroman-4-ones during the synthesis of 4-hydroxymethyl-2H-chromenes from 4-aryloxybut-2-yn-1-ols
TL;DR: The unexpected formation of chroman-4-ones by refluxing 4-aryloxybut-2-yn-1-ols in diethylaniline has been studied, 4-hydroxymethyl-2H-chromene and chroman 4-carboxaldehyde derivatives being established as intennediates.
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