17330-25-5Relevant articles and documents
Cleavage of activated cyclic amines: Unprecedented approach toward 2-substituted cyclobutanones
Baktharaman, Sivaraj,Selvakumar, Sermadurai,Singh, Vinod K.
, p. 4335 - 4338 (2006)
(Chemical Equation Presented) We report, for the first time, ring opening of activated four- to six-membered cyclic amines followed by an intramolecular expansion of cyclopropanol to cyclobutanone via carbocation intermediate. In the case of a N-tosylazir
Robust synthesis of N-sulfonylazetidine building blocks via ring contraction of α-bromo N-sulfonylpyrrolidinones
Kern, Nicolas,Felten, Anne-Sophie,Weibel, Jean-Marc,Pale, Patrick,Blanc, Aurlien
supporting information, p. 6104 - 6107 (2015/01/09)
A simple and robust one-pot nucleophilic addition-ring contraction of α-bromo N-sulfonylpyrrolidinones has been achieved toward α-carbonylated N-sulfonylazetidines. In the presence of potassium carbonate, various nucleophiles, such as alcohols, phenols or anilines, have been efficiently incorporated into the azetidine derivatives. Moreover, the α-bromopyrrolidinone precursors could be selectively obtained in good yields by monobromination of cheap and easily available N-sulfonyl-2-pyrrolidinone derivatives.
TRANSFORMATION OF N-TOSYL-2-(1,3-BUTADIENYL)AZIRIDINE INTO N-TOSYL-2-ETHENYL-3-PYRROLINE.
Fugami, Keigo,Miura, Katsukiyo,Morizawa, Yoshitomi,Oshima, Koichiro,Utimoto, Kiitiro,Nozaki, Hitosi
, p. 3089 - 3098 (2007/10/02)
1,3-Butadienylaziridines or 1,3-butadienylazetidines activated by N-tosyl group smoothly rearrange to vinylpyrroline derivatives or vinylpiperidines in the presence of a catalytic amount of Pd(PPh3)4.Triphenyltin radical induced rearrangement of title compounds is also described.