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The maleic anhydride adducts of tropolone and 2-methoxytropone

✍ Scribed by Shô Itô; Hitoshi Takeshita; Yoshikazu Shoji; Yasuo Toyooka; Tetsuo Nozoe

Publisher
Elsevier Science
Year
1968
Tongue
French
Weight
214 KB
Volume
9
Category
Article
ISSN
0040-4039

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✦ Synopsis

The Diels-Alder reaction of troponoid compounds has been studied using symmetric dienophiles in the cases of tropone (1,2), 2-halotropones (J), 4-methoxytropone (4).

2-methoxytropone (5),

tropolone and its homologues (6,7) and halotropolones (8,s).

Although crystalline adducts were obtained from all of these troponoids, only those from the first four were investigated in sufficient detail to permit reliable structures to be proposed. In light of our present knowledge on structures of three adduots (1 2 3 4 9 9 9 , 5), the ff-diketone structures proposed by Sebe and Osako (7) for the adduots from hinoki-

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