An Efficient Cobalt(I) Catalyst System for the Selective 1,4-Hydrovinylation of 1,3-Dienes

✍ Scribed by Gerhard Hilt; François-Xavier du Mesnil; Steffen Lüers

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 154 KB
• Volume: 40
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/1521-3773(20010119)40:2<387::aid-anie387>3.0.co;2-7

✦ Synopsis

Not a Diels-Alder reaction but a 1,4-hydrovinylation takes place on treatment of 1,3-dienes with functionalized alkenes in the presence of the catalyst system [CoBr (dppe)]/ZnI /Bu NBH (dppe = 1,2-bis(diphenylphosphanyl)ethane). With this reaction the 1,4-dienes with different substituents R -R can be obtained in high selectivity and good to excellent yields.