108289-99-2Relevant academic research and scientific papers
Preparation of 1,5-Disubstituted 4-Sulfonylpyrazoles, β-Cyano-β-sulfonylenamines and 5-Substituted 4-Sulfonylisoxazoles from β-Keto-β-sulfonylenamines
Takahashi, Masahiko,Mamiya, Tsutomu,Hasegawa, Hisao,Nagai, Takashi,Wakita, Hideki
, p. 1363 - 1366 (2007/10/02)
Reaction of β-keto-β-sulfonylenamines 1a,b with N-substituted hydrazines gave 1,5-disubstituted 4-sulfonylpyrazoles 2a-h in moderate yields, which were ring-opened on treatment with n-butyllithium to afford β-cyano-β-sulfonylenamines (3a,b,d-f). 5-Substituted 4-sulfonylisoxazoles 6a-d were also prepared from 1a-d and hydroxylamine.
