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Perkin rearrangement

Perkin Rearrangement (Coumarin-Benzofuran Ring Contraction)... [Pg.317]

Halocoumarins also undergo the Perkin rearrangement under various conditions. Thus, heating 3-chlorocoumarins (356), substituted or unsubstituted, with sodium methoxide in methanol gives the corresponding methyl ester of carboxybenzofurans (358, R = H).786,787... [Pg.455]

Chlorocoumarins also give the Perkin rearrangement, but the results vary according to conditions. Thus, 4-chlorocoumarin gives... [Pg.456]

Bowden, K., Battah, S. Reactions of carbonyl compounds in basic solutions. Part 32. The Perkin rearrangement. J. Chem. Soc., Perkin Trans. 21998, 1603-1606. [Pg.649]

Perkin rearrangement. Formation of benzo-furan-2-carboxylic acids and benzofurans by heating 3-halocoumarins with alkali. [Pg.961]

The name coumarone, which was previously used for benzo[6]furan, originates from this synthesis. The reaction of the intermediate 3,4-dibromO 3,4-dihydrocoumarin with KOH leading to benzofuran is known as Perkin rearrangement. [Pg.64]

The synthesis of benzofuran is also readily accomplished by base-catalyzed Perkins rearrangement of 2,3-dibromo-coumarin. ... [Pg.151]

Paal-Knorr Pyrrole Synthesis Parham Cyclization Passerini Reaction Patemo-Biichi Reaction Pauson-Khand Reaction Payne Rearrangement Pechmann Condensation Pechmann Pyrazole Synthesis Pellizzari Reaction Pelouze Synthesis Periodic Acid Oxidation Perkin Alicyclic Synthesis Perkin Reaction Perkin Rearrangement Perkow Reaction Peterson Reaction... [Pg.12]

Parham cycloalkylation 343 Patemo-Btichi reaction 46 von Pechmann synthesis (coumarin) 322 Pellizari synthesis (1,2,4-triazole) 270 Perkin rearrangement 82 Pfitzinger synthesis (quinoline) 398 Pictet-Gams synthesis (isoquinoline) 414 Pictet-Spengler synthesis (isoquinoline) 415 Piloty-Robinson synthesis (pyrrole) 119 Pinner synthesis (pyrimidine) 467 Plancher rearrangement 128 Polonovski reaction 545 Pomeranz-Fritsch synthesis (isoquinoline) 415 Prileschajew reaction 23 Prins reaction 452 Pummerer rearrangement 26, 457... [Pg.631]

See other pages where Perkin rearrangement is mentioned: [Pg.705]    [Pg.326]    [Pg.775]    [Pg.210]    [Pg.817]    [Pg.213]    [Pg.685]   
See also in sourсe #XX -- [ Pg.18 ]

See also in sourсe #XX -- [ Pg.64 ]



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PERKIN Coumann rearrangement

PERKIN Coumarin Rearrangement

Perkin

Perkin rearrangement (coumarin-benzofuran

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