Highly regio and chemoselective ring opening of epoxides with trimethylsilyl azide in the presence of aluminium isopropoxide and titanium isopropoxide
β Scribed by Kun I. Sutowardoyo; Mohamed Emziane; Paul Lhoste; Denis Sinou
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- French
- Weight
- 922 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0040-4020
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β¦ Synopsis
The ring-opening of functionalized epoxides with trimethylsilyl azide in the presence of a catalytic amount of Ti(O-i-l%)4 or Al@-i-F?)3 is described. The reaction is stereo8pecific and highly regiospecific, leading generally to the formation of the carbon-azido bond on the less substituted carbon. The mechanism of this reaction is also discussed.
π SIMILAR VOLUMES
Time dependence of the yields in c-acryloyloxyethyl-c-butyrolactone and poly(c-acryloyloxy-e-caprolactone) in toluene at 0 8C. Conditions: [ACL] 0 = 1 m, [ACL] 0 /[Al(O i Pr) 3 ] 0 = 50 (ACL: c-acryloyloxy-e-caprolactone). Scheme 1.