Tien Hsien-Ju, Lin Shaw-Tao, Sheu Jinn-Tsair, Can. J. Chem., 72 (1994) N 7, S 1610-1613
作者:Tien Hsien-Ju, Lin Shaw-Tao, Sheu Jinn-Tsair
DOI:——
日期:——
GOTTHARDT H.; REITER F., LIEBIGS ANN. CHEM., 1979, NO 1, 63-73
作者:GOTTHARDT H.、 REITER F.
DOI:——
日期:——
Acylation of Sydnones with Acetic Anhydride in the Presence of Montmorillonite K-10
作者:Kenneth Turnbull、Jones C. George
DOI:10.1080/00397919608004593
日期:1996.7
Abstract Various 4-acetyl sydnones 2 can be prepared in good yield by reaction of the corresponding 3-arylsydnones (cf. 1) with acetic anhydride at ∼ 110°C catalyzed by Montmorillonite K-10. The reaction fails where an ortho-keto moiety is present; therein sydnone ring cleavage occurs to form the corresponding indazole 3.