Iodine-Mediated Intramolecular Electrophilic Aromatic Cyclization in Allylamines: A General Route to Synthesis of Quinolines, Pyrazolo[4,3-b]pyridines, and Thieno[3,2-b]pyridines
摘要:
An unprecedented synthesis of aromatic ring annulated pyridines from suitably substituted primary allylamines via intramolecular electrophilic aromatic cyclization mediated by molecular iodine under mild conditions is described.
acid-catalyzed reductive α-alkylation of β-aminothiophenes was applied to the N-(thien-3-yl)acetamide and alkyl N-(thien-3-yl)carbamates. Without reduction, β-amino α-vinylthiophenes were obtained when α-branched aldehydes were used. β-(3-Aminothien-2-yl)α,β-unsaturatedketones, esters and nitriles were also prepared from the corresponding α-functionalized acetals. These amines are intermediates in the formation
[EN] BENZENE RING-CONTAINING COMPOUND, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF<br/>[FR] COMPOSÉ CONTENANT UN CYCLE BENZÉNIQUE, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION<br/>[ZH] 含苯环的化合物、其制备方法及应用
申请人:GUANGZHOU WELLHEALTH BIO PHARMACEUTICAL CO LTD
Iodine-Mediated Intramolecular Electrophilic Aromatic Cyclization in Allylamines: A General Route to Synthesis of Quinolines, Pyrazolo[4,3-<i>b</i>]pyridines, and Thieno[3,2-<i>b</i>]pyridines
An unprecedented synthesis of aromatic ring annulated pyridines from suitably substituted primary allylamines via intramolecular electrophilic aromatic cyclization mediated by molecular iodine under mild conditions is described.