4,5-Dihalopyrrole-2-carboxamide derivatives, prepared by reaction of a corresponding 4,5-dihalopyrrole-2-carboxylic acid halide or a corresponding 4,5-dihalopyrrol-2-yl trihalomethyl ketone with an appropriate amine, useful as antibacterial and herbicidal agents.
4,5-Dihalopyrrole-2-carboxamide derivatives, prepared by reaction of a corresponding 4,5-dihalopyrrole-2-carboxylic acid halide or a corresponding 4,5-dihalopyrrol-2-yl trihalomethyl ketone with an appropriate amine, have antibacterial and herbicidal activities.
4,5 Dihalopyrrol 2-yl di and tri halomethyl ketones
申请人:Sterling Drug Inc.
公开号:US03963746A1
公开(公告)日:1976-06-15
4,5-Dihalopyrrol-2-yl di- and trihalomethyl ketones, prepared by reaction of pyrrole with a di- or trihaloacetyl halide or with a di- or trihaloacetic anhydride and halogenation of the resulting pyrrol-2-yl di- or trihalomethyl ketone, useful as antibacterial, herbicidal and insecticidal agents.
Reduction of 2,2,2-trichloro-1-arylethanones by RMgX: mechanistic investigation and the synthesis of substituted α,α-dichloroketones
作者:Ali H. Essa、Reinner I. Lerrick、Floriana Tuna、Ross W. Harrington、William Clegg、Michael J. Hall
DOI:10.1039/c3cc39147g
日期:——
2-Trichloro-1-arylethanones undergo high yielding reductions to the corresponding 2,2-dichloro-1-arylethanones in the presence of RMgX. A single electron transfer mechanism for the reaction is proposed based on trapping experiments. Reaction of the intermediate enolates with a range of electrophiles is described, providing a convenient route to substituted alpha,alpha-dichloro-beta-hydroxyketones and related
A general method is described for the synthesis of 1,3′-bipyrroles. The route involves constructing a pyrrole ring on the nitrogen of a substituted 1H-pyrrole, so as to generate the 1,3′-bipyrrole. In this approach the nitrogen of the starting pyrrole was alkylated with a special Michaelacceptor having an allylic leaving group, and the product was then modified in such a way that the second pyrrole