Palladium-catalyzed regio- and stereoselective synthesis of N-protected 2,4-dialkylated azacyclobutanes from amino allenes
β Scribed by Miyuki Anzai; Ayako Toda; Hiroaki Ohno; Yoshiji Takemoto; Nobutaka Fujii; Toshiro Ibuka
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- French
- Weight
- 275 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
Palladium-catalyzed reaction of N-arylsulfonyl-l-alkyl-3,4-dienylamines with an aryl iodide in the presence of potassium carbonate in DMF at around 70Β°C affords most predominantly the 2,4-cis-disubstituted azacyclobutanes bearing an aryl group on the double bond in good yields.
π SIMILAR VOLUMES
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N-Boc-u-msylsarcosine ethyl ester (3) reacts under neutral conditions either with allylic carbonates or with vinyloxinme in the presence of a catalytic amount of Pd(PPh3) 4 and dppe (5 mol%) to give regio-and stereoselectively the corresponding allylated products $ and 6, respectively. Reductive des