Rapid and Efficient Microwave-Assisted Synthesis of 4-, 5-, 6- and 7-Azaindoles
作者:Nicolas Lachance、Myriam April、Marc-André Joly
DOI:10.1055/s-2005-872100
日期:——
imines/ enamines formed between aminopyridines and ketones are converted in moderate to good yields to the corresponding 4-, 5-, 6- or 7-azaindoles via the Hegedus-Mori-Heck reaction (intramolecular Heck reaction). A systematic examination of all isomeric azaindoles synthesis revealed this one-pot procedure to be general in scope.
Photochemistry of polvhalogenated enaminones is described under various conditions to give functionalized tetrahulroazacarbazolone (9, 15). Starting enaminones (2, 7, 14) also underwent competitive dehalogenations creating a sei o f .secondary products. Mechanistic aspect of the reactions are considered .
Compared Reactivity of Heterocyclic Enaminones: Photochemical and Palladium Catalyzed Synthesis of 6,7,8,9-Tetrahydro-5<i>H</i>-pyrido[3,2-<i>b</i>]indol-9-ones