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Ruthenium(II)-Catalyzed Selective Intramolecular [2 + 2 + 2] Alkyne Cyclotrimerizations

✍ Scribed by Yamamoto, Yoshihiko; Arakawa, Takayasu; Ogawa, Ryuji; Itoh, Kenji

Book ID: 121276324
Publisher: American Chemical Society
Year: 2003
Tongue: English
Weight: 546 KB
Volume: 125
Category: Article
ISSN: 0002-7863
DOI: 10.1021/ja0358697

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This is the first report on the selective synthesis of fulvenes via a [2+2+1] cyclotrimerization of alkynes under catalytic conditions. The reactions of aliphatic terminal alkynes 1a-e in the presence of a palladium catalyst in toluene gave the cyclotrimerization products 2a-e, not easily available