Reaction of Mono-, Di-, and Trichloronitrobenzenes with<i>N</i>-Methyl Substituted Cyclic Tertiary Amines under High Pressure
作者:Toshikazu Ibata、Muhong Shang、Tetsuo Demura
DOI:10.1246/bcsj.68.2717
日期:1995.9
The reactions of mono-, di-, and trichloronitrobenzenes with 1-methylpyrrolidine under high pressure gave products of demethylation and ring-opening through a quaternary pyrrolidinium chloride intermediate formed by the SNAr reaction. On the other hand, the reactions with 1-methylpiperidine and 4-methylmorpholine gave only demethylation products. The selectivities of the reactions of 1-methylpyrrolidine
Nucleophilic Substitution Reaction of Aromatic Chlorides with Cyclic Tertiary Amines under High Pressure
作者:Toshikazu Ibata、Muhong Shang、Tetsuo Demura
DOI:10.1246/cl.1994.359
日期:1994.2
The reaction of p-chloronitrobenzene with N-methylpyrrolidine under highpressure gave demethylation product and ring opening products through quaternary ammonium chloride intermediate formed by the SNAr reaction. On the other hand, the reactions with N-methylpiperidine and N-methylmorpholine gave only demethylation products. The reactions of o-chloronitrobenzene and 2,4-dichloronitrobenzene with above
Aromatic Nucleophilic Substitution of Halobenzenes with Amines under High Pressure
作者:Toshikazu Ibata、Yasushi Isogami、Jiro Toyoda
DOI:10.1246/bcsj.64.42
日期:1991.1
The nucleophilicsubstitutionreactions of aromatic halides having electron-attracting groups on ortho or para position with various primary and secondary amines were accelerated by highpressure to give the corresponding N-substituted anilines in high yields. The bulkiness of amines affects its reactivity to lower the yields of the products. Although the secondary amines are usually less reactive