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Ring-closing olefin metathesis for the synthesis of 1,8-diazabicyclo[4.3.0]non-3-ene-7,9-diones

โœ Scribed by Alexey B. Dyatkin

Publisher
Elsevier Science
Year
1997
Tongue
French
Weight
120 KB
Volume
38
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

A novel method for the efficient synthesis of 1,8-diazabicyclo[4.3.0]non-3-ene-7,9-diones 5 (bicyclic hydantoins) starting from ureas or Z-protected aminoacids has been developed. The key step is a ring-closing metathesis (RCM) reaction of diallyl substituted hydantoins 3 catalyzed by the ruthenium-carbene complex bis(tricyclohexylphosphine)benzilidine ruthenium dichloride (4).

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