The photo-fries rearrangement of 2,5-disubstituted phenyl acetates
โ Scribed by Rafael Suau; Gregorio Torres; Maria Valpuesta
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- French
- Weight
- 215 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0040-4039
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๐ SIMILAR VOLUMES
The rate constants for the 1,3-and 1,Mgmatropic hydrogen shifts of the phot&Fries rearranged intermediates of phenyl acetate produced by laser flash photolysis at 266 nm were directly measured in several solvents. The rate constant for the 1,3hydrogen shift (3.6 s-l) was faster than that for the l&s
The Fries rearrangement of phenyl acetate is catalysed by acidic zeolites such as H-Nu-2 and H-ZSM-5, with selectivities of 2-6:l in favout of para-substituted products. The Fries rearrangement of phenyl esters affords a mixture of o-and phydroxyphenylketones, together with phenol as a hydrolysis p