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Organic reactions at high pressure. The Diels-Alder reaction of p-benzoquinone with dienic esters

✍ Scribed by William G. Dauben; William R. Baker


Publisher
Elsevier Science
Year
1982
Tongue
French
Weight
190 KB
Volume
23
Category
Article
ISSN
0040-4039

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✦ Synopsis


The Diels-Alder reaction of e-benzoquinone with substituted dienoic esters affords good yields of 4a,5,8,8a-tetrahydro-1,4+aphthalenediones, free from the isomeric hydroquinone. The reactions were conducted at room temperature under 15 kbar (1.5 GPa) pressure in dichloromethane solutions.


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## Abstract The hetero Diels‐Alder reactions of enamino ketones 1 and 2 with the vinyl ethers 3–5a are studied in dichloromethane solution under high pressures up to 5 kbar. The kinetics is measured by on‐line FT‐IR spectroscopy to 3 kbar. The cycloaddition reactions of enamino ketones 1 and 2 with