Reaction of azulenes with 1-trifluoromethanesulfonylpyridinium trifluoromethanesulfonate (TPT) and synthesis of the parent azulene

S Ito, R Yokoyama, T Okujima, T Terazono…

Index: Ito, Shunji; Yokoyama, Ryuji; Okujima, Tetsuo; Terazono, Tomomi; Kubo, Takahiro; Tajiri, Akio; Watanabe, Masataka; Morita, Noboru Organic and biomolecular chemistry, 2003 , vol. 1, # 11 p. 1947 - 1952

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Citation Number: 17

Abstract

2-Azulenyl trifluoromethanesulfonate was prepared by the reaction of 2-hydroxyazulene with trifluoromethanesulfonic anhydride in the presence of triethylamine as a base. Under the use of pyridine, 1-trifluoromethanesulfonylpyridinium trifluoromethanesulfonate further reacted with 2-azulenyl trifluoromethanesulfonate to give 1-(1-trifluoromethanesulfonyl-1, 4- dihydropyridin-4-yl) azulenyl trifluoromethanesulfonate. Moreover, we found that azulenes ...