A convenient method for aerobic aromatization of 1,3,5-triarylpyrazolines to the corresponding pyrazoles by simply heating in dimethyl sulfoxide (DMSO) in an open atmosphere without catalyst is reported.
Abstract2-Cyano-substituted 1,4-benzothiazine 1,1-dioxides, required for antiviral studies, were prepared by a reductive cyclodehydration of an ortho-nitro sulfone precursor containing a pendant aryl ketone group. The ring-forming reaction also furnishes a non-cyclized benzamide as a major byproduct via an unexpected acyl transfer reaction.
The activity coefficients at infinite dilution and 273.15‐353.15 K are determined for MeX (X: C, Si, Ge, Sn, Pb) in each of CnH2n+2 (n = 12, 16, 20, 24).
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