Sulfonamides of primary amines bearing an aromatic ring at the gamma-position were treated with (diacyloxyiodo)arenes and:iodine under irradiation conditions with;a tungsten-lamp to give the corresponding 1,2,3,4-tetrahydroquinoline derivatives in moderate to good yields. Here, the reactivity depends on the Z-group (protecting group) of the starting amides. Under the same reaction conditions, some sulfonamides were treated with (diacetoxyiodo)benzene and iodine in the presence of aromatics to give the corresponding N-arylated amides. These reactions proceed through the intramolecular and intermolecular amidations onto aromatic rings via the sulfonamidyl radicals formed.
BENZENESULFONAMIDE COMPOUNDS FOR SOMATIC EMBRYOGENESIS IN PLANTS
申请人:Fiers Martijn
公开号:US20150291517A1
公开(公告)日:2015-10-15
Benzenesulfonamide compounds potentiate 2,4-D induced embryogenesis in plants. In particular, 4-chloro-N-methyl-N-(2-methylphenyl)benzenesulfonamide and analogs induce somatic embryogenesis in plants. Methods of inducing somatic embryogenesis comprise exposing selected plant tissues, e.g. seed embryos, to auxins, e.g. 2.4-D and the benzenesulfonamide compounds. Compounds can be prepared by reacting sulfonyl chloride, an amine and pyridine in CH
2
CI
2
. Crude product is suspended in ethyl acetate and washed in sodium and potassium hydrogen sulphates and brine, then dried and filtered.
Highly specific N-monomethylation of primary aromatic amines
作者:Adolfo Le Pera、Antonella Leggio、Angelo Liguori
DOI:10.1016/j.tet.2006.03.104
日期:2006.6
A synthetic methodology for the specific conversion of primary aromatic amines into their N-monomethyl derivatives under very mild conditions is presented. Anilines are treated with 4-nitrobenzenesulfonyl (nosyl) chloride to generate the corresponding sulfonamides 2 in high yields. The subsequent N-methylation reaction of the sulfonamides 2 with a solution of diazomethane is rapid and quantitative