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Stereoselective Synthesis of N , N ‘-Diaryl-2,5-dioxopiperazines from Homochiral or Racemic 2-Bromopropananilides †

✍ Scribed by D'Angeli, Ferruccio; Marchetti, Paolo; Rondanin, Riccardo; Bertolasi, Valerio

Book ID
127043883
Publisher
American Chemical Society
Year
1996
Tongue
English
Weight
152 KB
Volume
61
Category
Article
ISSN
0022-3263

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✍ Olga A. Tarasova; Nina A. Nedolya; Vladimir Yu. Vvedensky; Lambert Brandsma; Bor 📂 Article 📅 1997 🏛 Elsevier Science 🌐 French ⚖ 89 KB

A bs trac t: Reaction of lithiated ptopargylic amines with isothiocyanates, followed by addition of t-BuOK, t-BuOH and methyl iodide gives either 2,5-bis(N,N-dialkylamino)thiophenes or 1-alkyl-2-N,N-dialkylamino-5-methylthiopyn'oles depending on the temperature during the treatment with the base.