Hetero Diels-Alder reactions, intramolecular / High-pressure reactions / Diastereoselectivity / Pyrans / 1 -Oxa-l,3-butadiens / Isoxazolones The intramolecular hetero Diels-Alder reaction of the benzylidene-isoxazolone 3 giving the adducts 4 and 5 is studied in dichlormethane under high pressure up
Inter- and Intramolecular Hetero Diels-Alder Reactions, 49[1] Kinetics and Selectivity of the Intramolecular Hetero Diels-Alder Reaction of 1-Oxa-1,3-butadienes using a Benzylidenebarbituric Acid Derivative Effect of Pressure, Temperature, and Solvent
β Scribed by Buback, Michael ;Gerke, Kerstin ;Ott, Christian ;Tietze, Lutz F.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1994
- Tongue
- English
- Weight
- 735 KB
- Volume
- 127
- Category
- Article
- ISSN
- 0009-2940
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## Abstract The hetero DielsβAlder reaction of the enamino ketones 1b and 1c with ethyl vinyl ether (2) in dichloromethane to give the dihydropyrans 3b/4b and 3c/4c is studied at high pressure up to 5 kbar. The kinetics is measured by onβline FTβIR spectroscopy up to 3 kbar. The cycloadditions show
Azabutadienes f Isoxazoles f Tetrahydropyridines 1 Diels-Alder reactions / Sequential transformations Condensation of aldehydes 1 ae with 5-amino-3-methylisoxazole (4) gives the corresponding imines 5a-e with a 2-aza-1,3-butadiene moiety, which cyclize selctively, e.g. 5a to form the trans-fused tet