Synthesis

A Simple and Convenient Synthesis of 5-Alkyl-Substituted 3-Isopropenyl-and 3-Acetyltropolones

K Imafuku, K Arai

Index: Imafuku, Kimiaki; Arai, Kiyomi Synthesis, 1989 , # 7 p. 501 - 505

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Citation Number: 22

Abstract

2-Alkyl-substituted (ro-diincthylfulvencs 3a—d, prepared by alkaline condensation of alltyleyelopentadienes 2a—d with acetone. react with dichlorokctene to give 2-alkyl- substituted 7, 7-dichloro—4—isopropyl~ idencbicyclo [3. lt)] l1ept-2-en-6-ones 4a—d. The cycloadducts 4a-d are hydrolyzed in aqueous acetic acid in the presence of sodium acetate to give 5-alkyl-substituted 3-isopropcnyltropoloncs (2-hydroxy-3-isoprop—enyl-2, 4.6- ...