Chemistry Letters p. 391 - 394 (1982)
Update date:2022-08-11
Topics:
Ikeda, Toshihiko
Kobayashi, Shinjiro
Taniguchi, Hiroshi
In aqueous ethanol 1-aryl-5,7-di-t-butyl-2-(o-methoxyphenyl)-spiro<2.5>octa-1,4,7-trien-6-one 4 changed to 2-aryl-3-(3',5'-di-t-butyl-4'-hydroxyphenyl)benzofuran 5 in a more than 90percent yield.The selective formation of 5 is ascribed to a neighbouring group participation of the ortho-methoxyl group to an incipient vinyl cation.
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