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Peter J. Cremins

Researcher at University of Salford

Publications -  9
Citations -  111

Peter J. Cremins is an academic researcher from University of Salford. The author has contributed to research in topics: Bicyclic molecule & Methylene. The author has an hindex of 5, co-authored 9 publications receiving 108 citations.

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Cycloadditions of substituted benzopyran-4-ones to electron-rich dienes: a new route to xanthone derivatives

TL;DR: The benzopyranones 1 and 3 reacted with 2,3-dimethyl-1,3butadiene in the presence of titanium (IV) chloride to give the corresponding (4 + 2) cycloadducts 8 and 11, the former undergoing facile deformylation to give 9 and 10.
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Heteroannulation of 4-oxo-4H-1-benzopyrans (chromones) via the conjugate addition of haloalkanols in the presence of base

TL;DR: Chromones bearing electron-withdrawing substituents at C-3 react with 2-haloethanols and potassium carbonate in acetone to produce tetrahydrofuro[2,3-b][1]benzopyran-4-ones, the heteroannulation proceeding via the conjugate addition of the haloethanol to the chromone, followed by intramolecular alkylation.
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Routes of spiroacetals derived from chroman-4-one

TL;DR: Methyl 2-(4′-hydroxybutyl)chromone-3-carboxylate and derived epoxide (13) undergo spirocyclisation on treatment with iodomethane-potassium carbonate and Lewis acid respectively as mentioned in this paper.
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Preparative routes to spiroacetals derived from chroman-4-one (2,3-dihydro-4H-1-benzopyran-4-one)

TL;DR: In this paper, the spiroacetal structures of 2,3-epoxide and 2,4-oxo-4H-1-benzopyran-3-carboxylate were confirmed by X-ray crystallography.
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Selective oxidations with activated carbon: applications to substrates containing acidic allytic methine and methylene groups

TL;DR: In this paper, butenoates substituted at the γ-position with an acidifying group undergo a regioselective oxidation (in which a methine group is converted into a carbinol function and a methylene group into a keto moiety) in the presence of activated carbon.