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High pressure organic chemistry. 2. Diels-Alder reaction of thiophene with maleic anhydride at very high pressure

✍ Scribed by Kotsuki, Hiyoshizo; Kitagawa, Sachio; Nishizawa, Hitoshi; Tokoroyama, Takashi

Book ID
126294459
Publisher
American Chemical Society
Year
1978
Tongue
English
Weight
231 KB
Volume
43
Category
Article
ISSN
0022-3263

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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.