Platinum-catalyzed tandem carboalkoxylation-claisen rearrangement of arylalkynes bearing an ortho-1,5-dihydro-3H-2,4-dioxepine group

Chemistry Letters

Volumn 34, Issue 2, 2005, Pages 174-175

  Nakamura, Itaru ^a   Bajracharya, Gan B ^a   Yamamoto, Yoshinori ^a  

^a TOHOKU UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

ALKYNE DERIVATIVE; OXEPINE DERIVATIVE; PLATINUM;

ANALYTIC METHOD; ARTICLE; CATALYSIS; CHEMICAL PROCEDURES; CHEMICAL REACTION; REACTION ANALYSIS; TEMPERATURE DEPENDENCE;

EID: 17844365826     PISSN: 03667022     EISSN: None     Source Type: Journal    
DOI: 10.1246/cl.2005.174     Document Type: Article

References (16)

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7. 2 (13.3mg, 0.05 mmol) and β-pinene (27.2 mg, 0.2 mmol) in acetonitrile (2 mL) was added 1 (0.5 mmol) under argon atmosphere in a Wheaton microreactor. After heating at 100°C for 17-90 h, the reaction mixture was filtered through a short alumina column using hexane/ethyl acetate (4/1) as an eluent. Purification of the crude product by silica-gel column chromatography using hexane/ethyl acetate (49/1) as an eluent afforded 2.
8. The reason for the activation of the carboalkoxylation reaction by β-pinene is not clear at present. See also Ref. 3b.
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