Condensation Reactions of a Nitrodienamine with Grignard Reagents Prepared from Phenyl Bromide, Bromotoluene, Indoles, and Carbazole
摘要:
Condensation reactions of a nitrodienamine (1) with Grignard reagents prepared from phenyl bromide, 4-bromotoluene, indole (6a), 3-methylindole (6b), 2,3-dimethylindole (6c), 3-cyanomethylindole (6d), and carbazole (6e) were investigated.
The Pictet-Spengler reaction of tryptamine type 1, 2-dihydropyridine 5c derived from the cycloaddition of the sec-nitrodienamine 3c with acetaldehyde afforded the indoloquinolizine derivatives 6 and 7.
The sec-nitrodienamines 3 were prepared by reaction of the tert-nitrodienamine 1 with primary amines. The reaction of 3 with acetaldehyde afforded 2-methyl-3-nitro-1, 2-dihydropyridines 5, providing a new and efficient heterocyclic annulation reaction.
The reaction of a sec-nitrodienamine 3 with aldehyde compounds afforded 2-substituted 3-nitro-1,2-dihydropyridines 5, providing a heterocyclic annulation reaction.
仲硝基二胺3与醛化合物的反应得到2-取代的3-硝基-1,2-二氢吡啶5,提供了杂环环化反应。
Condensation Reactions of a Nitrodienamine with Organocopper and Alkyllithium Reagents Prepared from Pyrrole Derivatives
Condensation reactions of a nitrodienamine (1) with Grignard, organocopper and alkyllithium reagents prepared from pyrrole derivatives were investigated.
Condensation Reactions of a Nitrodienamine with Grignard and Organocopper Reagents Prepared from Indole Derivatives
Condensation reactions of a nitrodienamine (1) with Grignard and organocopper reagents prepared from indole derivatives were investigated. Indolyl Grignard reagents were prepared from 4-bromoindole (3a), 5-bromoindole (3b), 6-bromoindole (3c), and 5-nitroindole (3d) using methylmagnesium bromide. Indolyl organocopper reagents were prepared from indole (3e), 2-methylindole (3f), and 3-methylindole (3g) using dimethylcopperlithium.